diff --git a/classes/controllers/FrmEntriesController.php b/classes/controllers/FrmEntriesController.php
index f5bb6a99d2..9c12c6a966 100644
--- a/classes/controllers/FrmEntriesController.php
+++ b/classes/controllers/FrmEntriesController.php
@@ -374,7 +374,7 @@ public static function update_hidden_cols( $meta_id, $object_id, $meta_key, $met
 
 		global $frm_vars;
 
-		if ( ! isset( $frm_vars['prev_hidden_cols'] ) || ! $frm_vars['prev_hidden_cols'] ) {
+		if ( empty( $frm_vars['prev_hidden_cols'] ) ) {
 			// Don't continue if there's no previous value.
 			return;
 		}
@@ -728,7 +728,7 @@ public static function destroy() {
 
 		$params = FrmForm::get_admin_params();
 
-		if ( isset( $params['keep_post'] ) && $params['keep_post'] ) {
+		if ( ! empty( $params['keep_post'] ) ) {
 			self::unlink_post( $params['id'] );
 		}
 
@@ -870,7 +870,7 @@ private static function _delete_entry( $entry_id, $form ) {
 
 		FrmAppHelper::unserialize_or_decode( $form->options );
 
-		if ( isset( $form->options['no_save'] ) && $form->options['no_save'] ) {
+		if ( ! empty( $form->options['no_save'] ) ) {
 			self::unlink_post( $entry_id );
 			FrmEntry::destroy( $entry_id );
 		}
diff --git a/classes/controllers/FrmFormActionsController.php b/classes/controllers/FrmFormActionsController.php
index 98e7f6d722..84d9fca3f1 100644
--- a/classes/controllers/FrmFormActionsController.php
+++ b/classes/controllers/FrmFormActionsController.php
@@ -249,7 +249,7 @@ private static function active_actions( $action_controls ) {
 		$allowed = array();
 
 		foreach ( $action_controls as $action_control ) {
-			if ( isset( $action_control->action_options['active'] ) && $action_control->action_options['active'] ) {
+			if ( ! empty( $action_control->action_options['active'] ) ) {
 				$allowed[] = $action_control->id_base;
 			}
 		}
@@ -279,7 +279,7 @@ public static function show_action_icon_link( $action_control, $allowed ) {
 		$default_position = array_search( $action_control->id_base, $default_shown, true );
 		$allowed_count    = count( $allowed );
 
-		if ( isset( $action_control->action_options['active'] ) && $action_control->action_options['active'] ) {
+		if ( ! empty( $action_control->action_options['active'] ) ) {
 			$classes .= ' frm_active_action';
 		} else {
 			$classes .= ' frm_inactive_action';
diff --git a/classes/controllers/FrmStylesController.php b/classes/controllers/FrmStylesController.php
index 8058de306b..5fde3fafd5 100644
--- a/classes/controllers/FrmStylesController.php
+++ b/classes/controllers/FrmStylesController.php
@@ -1193,7 +1193,7 @@ public static function replace_relative_url( $css ) {
 	public static function enqueue_style() {
 		global $frm_vars;
 
-		if ( isset( $frm_vars['css_loaded'] ) && $frm_vars['css_loaded'] ) {
+		if ( ! empty( $frm_vars['css_loaded'] ) ) {
 			// The CSS has already been loaded.
 			return;
 		}
diff --git a/classes/factories/FrmFieldFactory.php b/classes/factories/FrmFieldFactory.php
index 9f56188b2c..ccf5d6991a 100644
--- a/classes/factories/FrmFieldFactory.php
+++ b/classes/factories/FrmFieldFactory.php
@@ -42,7 +42,7 @@ public static function create_field_value_selector( $field_id, $args ) {
 	public static function get_field_factory( $field ) {
 		if ( is_object( $field ) ) {
 			$field_info = self::get_field_object( $field );
-		} elseif ( isset( $field['id'] ) && $field['id'] ) {
+		} elseif ( ! empty( $field['id'] ) ) {
 			$field_info = self::get_field_object( $field['id'] );
 		} else {
 			$field_info = self::get_field_type( $field['type'], $field );
diff --git a/classes/helpers/FrmAppHelper.php b/classes/helpers/FrmAppHelper.php
index aee17b82a1..354ed4bc47 100644
--- a/classes/helpers/FrmAppHelper.php
+++ b/classes/helpers/FrmAppHelper.php
@@ -2913,7 +2913,7 @@ private static function fill_field_defaults( $field, $record, array &$values, $a
 
 		if ( $args['default'] ) {
 			$meta_value = $field->default_value;
-		} elseif ( $record->post_id && self::pro_is_installed() && isset( $field->field_options['post_field'] ) && $field->field_options['post_field'] ) {
+		} elseif ( $record->post_id && self::pro_is_installed() && ! empty( $field->field_options['post_field'] ) ) {
 			if ( ! isset( $field->field_options['custom_field'] ) ) {
 				$field->field_options['custom_field'] = '';
 			}
@@ -2951,7 +2951,7 @@ private static function fill_field_defaults( $field, $record, array &$values, $a
 
 		FrmFieldsHelper::prepare_edit_front_field( $field_array, $field, $values['id'], $args );
 
-		if ( ! isset( $field_array['unique'] ) || ! $field_array['unique'] ) {
+		if ( empty( $field_array['unique'] ) ) {
 			$field_array['unique_msg'] = '';
 		}
 
@@ -3274,7 +3274,7 @@ public static function human_time_diff( $from, $to = '', $levels = 1 ) {
 		}
 
 		foreach ( $time_strings as $k => $v ) {
-			if ( isset( $diff[ $k ] ) && $diff[ $k ] ) {
+			if ( ! empty( $diff[ $k ] ) ) {
 				$time_strings[ $k ] = $diff[ $k ] . ' ' . ( $diff[ $k ] > 1 ? $v[1] : $v[0] );
 			} elseif ( isset( $diff[ $k ] ) && count( $time_strings ) === 1 ) {
 				// Account for 0.
diff --git a/classes/helpers/FrmEntriesHelper.php b/classes/helpers/FrmEntriesHelper.php
index 8917a32051..07172ae38a 100644
--- a/classes/helpers/FrmEntriesHelper.php
+++ b/classes/helpers/FrmEntriesHelper.php
@@ -150,7 +150,7 @@ public static function value_is_posted( $field, $args ) {
 		$value_is_posted = false;
 
 		if ( $_POST ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
-			$repeating = isset( $args['repeating'] ) && $args['repeating'];
+			$repeating = ! empty( $args['repeating'] );
 
 			if ( $repeating ) {
 				if ( isset( $_POST['item_meta'][ $args['parent_field_id'] ][ $args['key_pointer'] ][ $field->id ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
diff --git a/classes/helpers/FrmFieldsHelper.php b/classes/helpers/FrmFieldsHelper.php
index 2a278b9119..bc4854567b 100644
--- a/classes/helpers/FrmFieldsHelper.php
+++ b/classes/helpers/FrmFieldsHelper.php
@@ -669,7 +669,7 @@ public static function is_placeholder_field_type( $type ) {
 	public static function get_checkbox_id( $field, $opt_key, $type = 'checkbox' ) {
 		$id = $field['id'];
 
-		if ( isset( $field['in_section'] ) && $field['in_section'] && ! FrmAppHelper::is_admin_page( 'formidable' ) ) {
+		if ( ! empty( $field['in_section'] ) && ! FrmAppHelper::is_admin_page( 'formidable' ) ) {
 			$id .= '-' . $field['in_section'];
 		}
 
diff --git a/classes/helpers/FrmFormsListHelper.php b/classes/helpers/FrmFormsListHelper.php
index 04c3e7e413..557c8b5c79 100644
--- a/classes/helpers/FrmFormsListHelper.php
+++ b/classes/helpers/FrmFormsListHelper.php
@@ -301,7 +301,7 @@ public function single_row( $item, $style = '' ) {
 					$val  = '<abbr title="' . esc_attr( gmdate( 'Y/m/d g:i:s A', strtotime( $item->created_at ) ) ) . '">' . $date . '</abbr>';
 					break;
 				case 'entries':
-					if ( isset( $item->options['no_save'] ) && $item->options['no_save'] ) {
+					if ( ! empty( $item->options['no_save'] ) ) {
 						$val = FrmAppHelper::icon_by_class(
 							'frmfont frm_forbid_icon frm_bstooltip',
 							array(
diff --git a/classes/helpers/FrmXMLHelper.php b/classes/helpers/FrmXMLHelper.php
index 34f3597ce5..5fd7dbc38c 100644
--- a/classes/helpers/FrmXMLHelper.php
+++ b/classes/helpers/FrmXMLHelper.php
@@ -1959,7 +1959,7 @@ public static function migrate_form_settings_to_actions( $form_options, $form_id
 	 * @param bool   $switch
 	 */
 	private static function migrate_post_settings_to_action( $form_options, $form_id, $post_type, &$imported, $switch ) {
-		if ( ! isset( $form_options['create_post'] ) || ! $form_options['create_post'] ) {
+		if ( empty( $form_options['create_post'] ) ) {
 			return;
 		}
 
@@ -2196,7 +2196,7 @@ private static function migrate_notifications_to_action( $form_options, $form_id
 				// Format the email data
 				self::format_email_data( $atts, $notification );
 
-				if ( isset( $notification['twilio'] ) && $notification['twilio'] ) {
+				if ( ! empty( $notification['twilio'] ) ) {
 					do_action( 'frm_create_twilio_action', $atts, $notification );
 				}
 
@@ -2357,7 +2357,7 @@ private static function switch_email_condition_field_ids( &$post_content ) {
 	 * @return void
 	 */
 	private static function migrate_autoresponder_to_action( $form_options, $form_id, &$notifications ) {
-		if ( isset( $form_options['auto_responder'] ) && $form_options['auto_responder'] && isset( $form_options['ar_email_message'] ) && $form_options['ar_email_message'] ) {
+		if ( ! empty( $form_options['auto_responder'] ) && ! empty( $form_options['ar_email_message'] ) ) {
 			// migrate autoresponder
 
 			$email_field = $form_options['ar_email_to'] ?? 0;
diff --git a/classes/models/FrmEntryFormatter.php b/classes/models/FrmEntryFormatter.php
index 77260abe6a..1503f4e7ff 100644
--- a/classes/models/FrmEntryFormatter.php
+++ b/classes/models/FrmEntryFormatter.php
@@ -247,7 +247,7 @@ protected function init_array_key( $atts ) {
 	 * @return void
 	 */
 	protected function init_is_plain_text( $atts ) {
-		if ( isset( $atts['plain_text'] ) && $atts['plain_text'] ) {
+		if ( ! empty( $atts['plain_text'] ) ) {
 			$this->is_plain_text = true;
 		} elseif ( $atts['format'] !== 'text' ) {
 			$this->is_plain_text = true;
@@ -264,7 +264,7 @@ protected function init_is_plain_text( $atts ) {
 	 * @return void
 	 */
 	protected function init_include_blank( $atts ) {
-		if ( isset( $atts['include_blank'] ) && $atts['include_blank'] ) {
+		if ( ! empty( $atts['include_blank'] ) ) {
 			$this->include_blank = true;
 		}
 	}
@@ -294,7 +294,7 @@ protected function init_direction( $atts ) {
 	 * @return void
 	 */
 	protected function init_include_user_info( $atts ) {
-		if ( isset( $atts['user_info'] ) && $atts['user_info'] ) {
+		if ( ! empty( $atts['user_info'] ) ) {
 			$this->include_user_info = true;
 		}
 	}
@@ -320,7 +320,7 @@ protected function skip_fields() {
 	 * @return void
 	 */
 	protected function init_include_extras( $atts ) {
-		if ( isset( $atts['include_extras'] ) && $atts['include_extras'] ) {
+		if ( ! empty( $atts['include_extras'] ) ) {
 			$this->include_extras = array_map( 'strtolower', array_map( 'trim', explode( ',', $atts['include_extras'] ) ) );
 		}
 	}
@@ -359,7 +359,7 @@ protected function init_table_generator( $atts ) {
 	 * @return void
 	 */
 	protected function init_is_clickable( $atts ) {
-		if ( isset( $atts['clickable'] ) && $atts['clickable'] ) {
+		if ( ! empty( $atts['clickable'] ) ) {
 			$this->is_clickable = true;
 		}
 	}
diff --git a/classes/models/FrmEntryShortcodeFormatter.php b/classes/models/FrmEntryShortcodeFormatter.php
index ff291d2419..feecae1278 100644
--- a/classes/models/FrmEntryShortcodeFormatter.php
+++ b/classes/models/FrmEntryShortcodeFormatter.php
@@ -124,7 +124,7 @@ protected function init_fields() {
 	 * @return void
 	 */
 	protected function init_plain_text( $atts ) {
-		if ( isset( $atts['plain_text'] ) && $atts['plain_text'] ) {
+		if ( ! empty( $atts['plain_text'] ) ) {
 			$this->is_plain_text = true;
 		}
 	}
diff --git a/classes/models/FrmField.php b/classes/models/FrmField.php
index 9d08d04b70..55244dd803 100644
--- a/classes/models/FrmField.php
+++ b/classes/models/FrmField.php
@@ -1440,7 +1440,7 @@ public static function is_option_true_in_array( $field, $option ) {
 	 * @return bool
 	 */
 	public static function is_option_true_in_object( $field, $option ) {
-		return isset( $field->field_options[ $option ] ) && $field->field_options[ $option ];
+		return ! empty( $field->field_options[ $option ] );
 	}
 
 	/**
diff --git a/classes/models/FrmFieldFormHtml.php b/classes/models/FrmFieldFormHtml.php
index 82dc6b8a29..ed24cd6acb 100644
--- a/classes/models/FrmFieldFormHtml.php
+++ b/classes/models/FrmFieldFormHtml.php
@@ -532,7 +532,7 @@ private function get_field_div_classes() {
 		// Add label position class
 		$settings = $this->field_obj->display_field_settings();
 
-		if ( isset( $settings['label_position'] ) && $settings['label_position'] ) {
+		if ( ! empty( $settings['label_position'] ) ) {
 			$label_position = $this->field_obj->get_field_column( 'label' );
 			$classes       .= ' frm_' . $label_position . '_container';
 
diff --git a/classes/models/FrmSolution.php b/classes/models/FrmSolution.php
index 7540dfea25..621a66cd65 100644
--- a/classes/models/FrmSolution.php
+++ b/classes/models/FrmSolution.php
@@ -463,7 +463,7 @@ protected function step_top( $step ) {
 		<section class="step step-install <?php echo esc_attr( $section_class ); ?>">
 			<aside class="num">
 			<?php
-			if ( isset( $step['complete'] ) && $step['complete'] ) {
+			if ( ! empty( $step['complete'] ) ) {
 				FrmAppHelper::icon_by_class(
 					'frmfont frm_step_complete_icon',
 					array(
diff --git a/classes/models/fields/FrmFieldType.php b/classes/models/fields/FrmFieldType.php
index f24e6412d3..a2f82d7083 100644
--- a/classes/models/fields/FrmFieldType.php
+++ b/classes/models/fields/FrmFieldType.php
@@ -993,7 +993,7 @@ public function show_field( $args ) {
 	 * @return void
 	 */
 	protected function get_field_scripts_hook( $args ) {
-		$form_id = isset( $args['parent_form_id'] ) && $args['parent_form_id'] ? $args['parent_form_id'] : $args['form']->id;
+		$form_id = ! empty( $args['parent_form_id'] ) ? $args['parent_form_id'] : $args['form']->id;
 		do_action( 'frm_get_field_scripts', $this->field, $args['form'], $form_id );
 	}
 
diff --git a/classes/views/frm-entries/no_entries.php b/classes/views/frm-entries/no_entries.php
index 2507225464..05c25dd941 100644
--- a/classes/views/frm-entries/no_entries.php
+++ b/classes/views/frm-entries/no_entries.php
@@ -4,7 +4,7 @@
 }
 ?>
 <div class="frmcenter frm_no_entries_form frm_placeholder_block">
-<?php if ( $form && isset( $form->options['no_save'] ) && $form->options['no_save'] ) { ?>
+<?php if ( $form && ! empty( $form->options['no_save'] ) ) { ?>
 <h3><?php esc_html_e( 'This form is not set to save any entries.', 'formidable' ); ?></h3>
 <p>
 	<?php
diff --git a/classes/views/frm-fields/back-end/default-value-setting.php b/classes/views/frm-fields/back-end/default-value-setting.php
index d9885caaac..6491153418 100644
--- a/classes/views/frm-fields/back-end/default-value-setting.php
+++ b/classes/views/frm-fields/back-end/default-value-setting.php
@@ -15,7 +15,7 @@ class="frm-has-modal frm-default-value-wrapper default-value-section-<?php echo
 
 	<span class="frm-flex-col frm-with-right-icon">
 		<?php
-		if ( isset( $display['default_value'] ) && $display['default_value'] ) {
+		if ( ! empty( $display['default_value'] ) ) {
 			$default_name  = 'field_options[dyn_default_value_' . $field['id'] . ']';
 			$default_value = $field['dyn_default_value'] ?? '';
 		} else {
diff --git a/classes/views/frm-fields/single-option.php b/classes/views/frm-fields/single-option.php
index e75fa211e5..3a9293555b 100644
--- a/classes/views/frm-fields/single-option.php
+++ b/classes/views/frm-fields/single-option.php
@@ -13,7 +13,7 @@
 
 	?>
 	<?php if ( in_array( $default_type, array( 'radio', 'checkbox' ), true ) ) : ?>
-		<input type="<?php echo esc_attr( $default_type ); ?>" name="<?php echo esc_attr( $field_name ); ?>" <?php echo ( isset( $checked ) && $checked ? 'checked="checked"' : '' ); ?> value="<?php echo esc_attr( $field_val ); ?>"/>
+		<input type="<?php echo esc_attr( $default_type ); ?>" name="<?php echo esc_attr( $field_name ); ?>" <?php echo ( ! empty( $checked ) ? 'checked="checked"' : '' ); ?> value="<?php echo esc_attr( $field_val ); ?>"/>
 	<?php endif; ?>
 
 	<input type="text" name="field_options[options_<?php echo esc_attr( $field['id'] ); ?>][<?php echo esc_attr( $opt_key ); ?>][label]" value="<?php echo esc_attr( $opt ); ?>" class="field_<?php echo esc_attr( $field['id'] ); ?>_option <?php echo esc_attr( $field['separate_value'] ? 'frm_with_key' : '' ); ?>" id="<?php echo esc_attr( $html_id . '-' . $opt_key . '-label' ); ?>" data-frmchange="trim,updateOption,checkUniqueOpt" />
diff --git a/classes/views/frm-forms/_publish_box.php b/classes/views/frm-forms/_publish_box.php
index 5f580d1c0a..75963d2b1a 100644
--- a/classes/views/frm-forms/_publish_box.php
+++ b/classes/views/frm-forms/_publish_box.php
@@ -16,7 +16,7 @@
 </button>
 
 <div id="frm-preview-action">
-	<?php if ( ( ! isset( $hide_preview ) || ! $hide_preview ) && isset( $values['form_key'] ) ) { ?>
+	<?php if ( empty( $hide_preview ) && isset( $values['form_key'] ) ) { ?>
 		<div class="preview dropdown">
 			<a href="#" id="frm-previewDrop" class="frm-dropdown-toggle button frm-button-secondary" role="button">
 				<?php esc_html_e( 'Preview', 'formidable' ); ?>
diff --git a/css/_single_theme.css.php b/css/_single_theme.css.php
index d783c2e2e8..d9085bebf9 100644
--- a/css/_single_theme.css.php
+++ b/css/_single_theme.css.php
@@ -183,7 +183,7 @@
 	background-color:var(--bg-color-active)<?php echo esc_html( $important ); ?>;
 	border-color:var(--border-color-active)<?php echo esc_html( $important ); ?>;
 	color:var(--text-color);
-	<?php if ( isset( $remove_box_shadow_active ) && $remove_box_shadow_active ) { ?>
+	<?php if ( ! empty( $remove_box_shadow_active ) ) { ?>
 	box-shadow:none;
 	outline: none;
 	<?php } else { ?>
diff --git a/phpcs-sniffs/Formidable/Sniffs/CodeAnalysis/SimplifyIssetFalsyCheckSniff.php b/phpcs-sniffs/Formidable/Sniffs/CodeAnalysis/SimplifyIssetFalsyCheckSniff.php
new file mode 100644
index 0000000000..065a4db353
--- /dev/null
+++ b/phpcs-sniffs/Formidable/Sniffs/CodeAnalysis/SimplifyIssetFalsyCheckSniff.php
@@ -0,0 +1,255 @@
+<?php
+/**
+ * Formidable_Sniffs_CodeAnalysis_SimplifyIssetFalsyCheckSniff
+ *
+ * Detects patterns like `! isset( $x ) || ! $x` that can be simplified to `empty( $x )`.
+ *
+ * @package Formidable\Sniffs
+ */
+
+namespace Formidable\Sniffs\CodeAnalysis;
+
+use PHP_CodeSniffer\Sniffs\Sniff;
+use PHP_CodeSniffer\Files\File;
+
+/**
+ * Detects patterns that can be simplified using empty().
+ *
+ * Bad:
+ * if ( ! isset( $arr['key'] ) || ! $arr['key'] ) { ... }
+ *
+ * Good:
+ * if ( empty( $arr['key'] ) ) { ... }
+ */
+class SimplifyIssetFalsyCheckSniff implements Sniff {
+
+	/**
+	 * Returns an array of tokens this test wants to listen for.
+	 *
+	 * @return array
+	 */
+	public function register() {
+		return array( T_ISSET );
+	}
+
+	/**
+	 * Processes this test, when one of its tokens is encountered.
+	 *
+	 * @param File $phpcsFile The file being scanned.
+	 * @param int  $stackPtr  The position of the current token in the stack passed in $tokens.
+	 *
+	 * @return void
+	 */
+	public function process( File $phpcsFile, $stackPtr ) {
+		$tokens = $phpcsFile->getTokens();
+
+		// Check if isset is negated with "!".
+		$prevToken = $phpcsFile->findPrevious( T_WHITESPACE, $stackPtr - 1, null, true );
+
+		if ( false === $prevToken || $tokens[ $prevToken ]['code'] !== T_BOOLEAN_NOT ) {
+			return;
+		}
+
+		$notToken = $prevToken;
+
+		// Find the opening parenthesis after isset.
+		$issetOpenParen = $phpcsFile->findNext( T_WHITESPACE, $stackPtr + 1, null, true );
+
+		if ( false === $issetOpenParen || $tokens[ $issetOpenParen ]['code'] !== T_OPEN_PARENTHESIS ) {
+			return;
+		}
+
+		if ( ! isset( $tokens[ $issetOpenParen ]['parenthesis_closer'] ) ) {
+			return;
+		}
+
+		$issetCloseParen = $tokens[ $issetOpenParen ]['parenthesis_closer'];
+
+		// Get the variable/expression inside isset().
+		$issetContent = $this->getParenthesesContent( $phpcsFile, $issetOpenParen, $issetCloseParen );
+
+		if ( empty( $issetContent ) ) {
+			return;
+		}
+
+		// Find the || operator after isset().
+		$orOperator = $phpcsFile->findNext( T_WHITESPACE, $issetCloseParen + 1, null, true );
+
+		if ( false === $orOperator || $tokens[ $orOperator ]['code'] !== T_BOOLEAN_OR ) {
+			return;
+		}
+
+		// Find the "!" after ||.
+		$secondNot = $phpcsFile->findNext( T_WHITESPACE, $orOperator + 1, null, true );
+
+		if ( false === $secondNot || $tokens[ $secondNot ]['code'] !== T_BOOLEAN_NOT ) {
+			return;
+		}
+
+		// Find the variable after the second "!".
+		$secondVarStart = $phpcsFile->findNext( T_WHITESPACE, $secondNot + 1, null, true );
+
+		if ( false === $secondVarStart ) {
+			return;
+		}
+
+		// Get the second expression and compare with the first.
+		$secondContent = $this->getExpressionContent( $phpcsFile, $secondVarStart );
+
+		if ( empty( $secondContent ) || $secondContent['content'] !== $issetContent['content'] ) {
+			return;
+		}
+
+		// We have a match! Report the error.
+		$fix = $phpcsFile->addFixableError(
+			'Simplify "! isset( %s ) || ! %s" to "empty( %s )"',
+			$stackPtr,
+			'Found',
+			array( $issetContent['content'], $secondContent['content'], $issetContent['content'] )
+		);
+
+		if ( true === $fix ) {
+			$phpcsFile->fixer->beginChangeset();
+
+			// Remove the "!" before isset.
+			$phpcsFile->fixer->replaceToken( $notToken, '' );
+
+			// Remove whitespace between "!" and "isset".
+			for ( $i = $notToken + 1; $i < $stackPtr; $i++ ) {
+				if ( $tokens[ $i ]['code'] === T_WHITESPACE ) {
+					$phpcsFile->fixer->replaceToken( $i, '' );
+				}
+			}
+
+			// Replace "isset" with "empty".
+			$phpcsFile->fixer->replaceToken( $stackPtr, 'empty' );
+
+			// Remove everything from after isset's closing paren to end of second expression.
+			$endToken = $secondContent['end'];
+
+			for ( $i = $issetCloseParen + 1; $i <= $endToken; $i++ ) {
+				$phpcsFile->fixer->replaceToken( $i, '' );
+			}
+
+			$phpcsFile->fixer->endChangeset();
+		}
+	}
+
+	/**
+	 * Get the content inside parentheses as a normalized string.
+	 *
+	 * @param File $phpcsFile  The file being scanned.
+	 * @param int  $openParen  The position of the opening parenthesis.
+	 * @param int  $closeParen The position of the closing parenthesis.
+	 *
+	 * @return array|false Array with 'content', 'start', 'end' keys, or false on failure.
+	 */
+	private function getParenthesesContent( File $phpcsFile, $openParen, $closeParen ) {
+		$tokens  = $phpcsFile->getTokens();
+		$content = '';
+		$start   = null;
+		$end     = null;
+
+		for ( $i = $openParen + 1; $i < $closeParen; $i++ ) {
+			if ( $tokens[ $i ]['code'] === T_WHITESPACE ) {
+				continue;
+			}
+
+			if ( null === $start ) {
+				$start = $i;
+			}
+
+			$end      = $i;
+			$content .= $tokens[ $i ]['content'];
+		}
+
+		if ( empty( $content ) ) {
+			return false;
+		}
+
+		return array(
+			'content' => $content,
+			'start'   => $start,
+			'end'     => $end,
+		);
+	}
+
+	/**
+	 * Get an expression starting from a given token.
+	 *
+	 * @param File $phpcsFile The file being scanned.
+	 * @param int  $startPtr  The starting position.
+	 *
+	 * @return array|false Array with 'content', 'start', 'end' keys, or false on failure.
+	 */
+	private function getExpressionContent( File $phpcsFile, $startPtr ) {
+		$tokens  = $phpcsFile->getTokens();
+		$content = '';
+		$end     = $startPtr;
+
+		// Valid tokens in an expression like $arr['key'].
+		$validTokens = array(
+			T_VARIABLE,
+			T_STRING,
+			T_CONSTANT_ENCAPSED_STRING,
+			T_LNUMBER,
+			T_DNUMBER,
+			T_OPEN_SQUARE_BRACKET,
+			T_CLOSE_SQUARE_BRACKET,
+			T_OBJECT_OPERATOR,
+			T_NULLSAFE_OBJECT_OPERATOR,
+			T_DOUBLE_COLON,
+		);
+
+		$bracketDepth = 0;
+
+		for ( $i = $startPtr; $i < count( $tokens ); $i++ ) {
+			$code = $tokens[ $i ]['code'];
+
+			// Skip whitespace.
+			if ( $code === T_WHITESPACE ) {
+				continue;
+			}
+
+			// Track bracket depth.
+			if ( $code === T_OPEN_SQUARE_BRACKET ) {
+				++$bracketDepth;
+				$content .= $tokens[ $i ]['content'];
+				$end      = $i;
+				continue;
+			}
+
+			if ( $code === T_CLOSE_SQUARE_BRACKET ) {
+				--$bracketDepth;
+				$content .= $tokens[ $i ]['content'];
+				$end      = $i;
+				continue;
+			}
+
+			// If we're inside brackets, accept more token types.
+			if ( $bracketDepth > 0 ) {
+				$content .= $tokens[ $i ]['content'];
+				$end      = $i;
+				continue;
+			}
+
+			// Outside brackets, only accept valid expression tokens.
+			if ( ! in_array( $code, $validTokens, true ) ) {
+				break;
+			}
+
+			$content .= $tokens[ $i ]['content'];
+			$end      = $i;
+		}
+
+		if ( empty( $content ) ) {
+			return false;
+		}
+
+		return array(
+			'content' => $content,
+			'start'   => $startPtr,
+			'end'     => $end,
+		);
+	}
+}
diff --git a/phpcs-sniffs/Formidable/Sniffs/CodeAnalysis/SimplifyIssetTruthyCheckSniff.php b/phpcs-sniffs/Formidable/Sniffs/CodeAnalysis/SimplifyIssetTruthyCheckSniff.php
new file mode 100644
index 0000000000..e2d66d04e0
--- /dev/null
+++ b/phpcs-sniffs/Formidable/Sniffs/CodeAnalysis/SimplifyIssetTruthyCheckSniff.php
@@ -0,0 +1,258 @@
+<?php
+/**
+ * Formidable_Sniffs_CodeAnalysis_SimplifyIssetTruthyCheckSniff
+ *
+ * Detects patterns like `isset( $x ) && $x` that can be simplified to `! empty( $x )`.
+ *
+ * @package Formidable\Sniffs
+ */
+
+namespace Formidable\Sniffs\CodeAnalysis;
+
+use PHP_CodeSniffer\Sniffs\Sniff;
+use PHP_CodeSniffer\Files\File;
+
+/**
+ * Detects patterns that can be simplified using ! empty().
+ *
+ * Bad:
+ * if ( isset( $arr['key'] ) && $arr['key'] ) { ... }
+ *
+ * Good:
+ * if ( ! empty( $arr['key'] ) ) { ... }
+ */
+class SimplifyIssetTruthyCheckSniff implements Sniff {
+
+	/**
+	 * Returns an array of tokens this test wants to listen for.
+	 *
+	 * @return array
+	 */
+	public function register() {
+		return array( T_ISSET );
+	}
+
+	/**
+	 * Processes this test, when one of its tokens is encountered.
+	 *
+	 * @param File $phpcsFile The file being scanned.
+	 * @param int  $stackPtr  The position of the current token in the stack passed in $tokens.
+	 *
+	 * @return void
+	 */
+	public function process( File $phpcsFile, $stackPtr ) {
+		$tokens = $phpcsFile->getTokens();
+
+		// Check that isset is NOT negated (we want `isset()` not `! isset()`).
+		$prevToken = $phpcsFile->findPrevious( T_WHITESPACE, $stackPtr - 1, null, true );
+
+		if ( false !== $prevToken && $tokens[ $prevToken ]['code'] === T_BOOLEAN_NOT ) {
+			return;
+		}
+
+		// Find the opening parenthesis after isset.
+		$issetOpenParen = $phpcsFile->findNext( T_WHITESPACE, $stackPtr + 1, null, true );
+
+		if ( false === $issetOpenParen || $tokens[ $issetOpenParen ]['code'] !== T_OPEN_PARENTHESIS ) {
+			return;
+		}
+
+		if ( ! isset( $tokens[ $issetOpenParen ]['parenthesis_closer'] ) ) {
+			return;
+		}
+
+		$issetCloseParen = $tokens[ $issetOpenParen ]['parenthesis_closer'];
+
+		// Get the variable/expression inside isset().
+		$issetContent = $this->getParenthesesContent( $phpcsFile, $issetOpenParen, $issetCloseParen );
+
+		if ( empty( $issetContent ) ) {
+			return;
+		}
+
+		// Find the && operator after isset().
+		$andOperator = $phpcsFile->findNext( T_WHITESPACE, $issetCloseParen + 1, null, true );
+
+		if ( false === $andOperator || $tokens[ $andOperator ]['code'] !== T_BOOLEAN_AND ) {
+			return;
+		}
+
+		// Find the variable after &&.
+		$secondVarStart = $phpcsFile->findNext( T_WHITESPACE, $andOperator + 1, null, true );
+
+		if ( false === $secondVarStart ) {
+			return;
+		}
+
+		// Get the second expression and compare with the first.
+		$secondContent = $this->getExpressionContent( $phpcsFile, $secondVarStart );
+
+		if ( empty( $secondContent ) || $secondContent['content'] !== $issetContent['content'] ) {
+			return;
+		}
+
+		// Check that there's no comparison operator after the second variable.
+		// We only want pure truthy checks like `isset($x) && $x`, not `isset($x) && $x == 'value'`.
+		$afterSecondVar = $phpcsFile->findNext( T_WHITESPACE, $secondContent['end'] + 1, null, true );
+
+		if ( false !== $afterSecondVar ) {
+			$comparisonOperators = array(
+				T_IS_EQUAL,
+				T_IS_NOT_EQUAL,
+				T_IS_IDENTICAL,
+				T_IS_NOT_IDENTICAL,
+				T_LESS_THAN,
+				T_GREATER_THAN,
+				T_IS_SMALLER_OR_EQUAL,
+				T_IS_GREATER_OR_EQUAL,
+				T_SPACESHIP,
+			);
+
+			if ( in_array( $tokens[ $afterSecondVar ]['code'], $comparisonOperators, true ) ) {
+				return;
+			}
+		}
+
+		// We have a match! Report the error.
+		$fix = $phpcsFile->addFixableError(
+			'Simplify "isset( %s ) && %s" to "! empty( %s )"',
+			$stackPtr,
+			'Found',
+			array( $issetContent['content'], $secondContent['content'], $issetContent['content'] )
+		);
+
+		if ( true === $fix ) {
+			$phpcsFile->fixer->beginChangeset();
+
+			// Replace "isset" with "! empty".
+			$phpcsFile->fixer->replaceToken( $stackPtr, '! empty' );
+
+			// Remove everything from after isset's closing paren to end of second expression.
+			$endToken = $secondContent['end'];
+
+			for ( $i = $issetCloseParen + 1; $i <= $endToken; $i++ ) {
+				$phpcsFile->fixer->replaceToken( $i, '' );
+			}
+
+			$phpcsFile->fixer->endChangeset();
+		}
+	}
+
+	/**
+	 * Get the content inside parentheses as a normalized string.
+	 *
+	 * @param File $phpcsFile  The file being scanned.
+	 * @param int  $openParen  The position of the opening parenthesis.
+	 * @param int  $closeParen The position of the closing parenthesis.
+	 *
+	 * @return array|false Array with 'content', 'start', 'end' keys, or false on failure.
+	 */
+	private function getParenthesesContent( File $phpcsFile, $openParen, $closeParen ) {
+		$tokens  = $phpcsFile->getTokens();
+		$content = '';
+		$start   = null;
+		$end     = null;
+
+		for ( $i = $openParen + 1; $i < $closeParen; $i++ ) {
+			if ( $tokens[ $i ]['code'] === T_WHITESPACE ) {
+				continue;
+			}
+
+			if ( null === $start ) {
+				$start = $i;
+			}
+
+			$end      = $i;
+			$content .= $tokens[ $i ]['content'];
+		}
+
+		if ( empty( $content ) ) {
+			return false;
+		}
+
+		return array(
+			'content' => $content,
+			'start'   => $start,
+			'end'     => $end,
+		);
+	}
+
+	/**
+	 * Get an expression starting from a given token.
+	 *
+	 * @param File $phpcsFile The file being scanned.
+	 * @param int  $startPtr  The starting position.
+	 *
+	 * @return array|false Array with 'content', 'start', 'end' keys, or false on failure.
+	 */
+	private function getExpressionContent( File $phpcsFile, $startPtr ) {
+		$tokens  = $phpcsFile->getTokens();
+		$content = '';
+		$end     = $startPtr;
+
+		// Valid tokens in an expression like $arr['key'] or $obj->prop.
+		$validTokens = array(
+			T_VARIABLE,
+			T_STRING,
+			T_CONSTANT_ENCAPSED_STRING,
+			T_LNUMBER,
+			T_DNUMBER,
+			T_OPEN_SQUARE_BRACKET,
+			T_CLOSE_SQUARE_BRACKET,
+			T_OBJECT_OPERATOR,
+			T_NULLSAFE_OBJECT_OPERATOR,
+			T_DOUBLE_COLON,
+		);
+
+		$bracketDepth = 0;
+
+		for ( $i = $startPtr; $i < count( $tokens ); $i++ ) {
+			$code = $tokens[ $i ]['code'];
+
+			// Skip whitespace.
+			if ( $code === T_WHITESPACE ) {
+				continue;
+			}
+
+			// Track bracket depth.
+			if ( $code === T_OPEN_SQUARE_BRACKET ) {
+				++$bracketDepth;
+				$content .= $tokens[ $i ]['content'];
+				$end      = $i;
+				continue;
+			}
+
+			if ( $code === T_CLOSE_SQUARE_BRACKET ) {
+				--$bracketDepth;
+				$content .= $tokens[ $i ]['content'];
+				$end      = $i;
+				continue;
+			}
+
+			// If we're inside brackets, accept more token types.
+			if ( $bracketDepth > 0 ) {
+				$content .= $tokens[ $i ]['content'];
+				$end      = $i;
+				continue;
+			}
+
+			// Outside brackets, only accept valid expression tokens.
+			if ( ! in_array( $code, $validTokens, true ) ) {
+				break;
+			}
+
+			$content .= $tokens[ $i ]['content'];
+			$end      = $i;
+		}
+
+		if ( empty( $content ) ) {
+			return false;
+		}
+
+		return array(
+			'content' => $content,
+			'start'   => $startPtr,
+			'end'     => $end,
+		);
+	}
+}
diff --git a/phpcs.xml b/phpcs.xml
index f63296a2b8..2913bcaeb4 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -284,4 +284,6 @@
 	<rule ref="Formidable.WhiteSpace.BlankLineBeforeReturnAfterBrace" />
 	<rule ref="Formidable.CodeAnalysis.RedundantEmptyOnParameter" />
 	<rule ref="Formidable.CodeAnalysis.RedundantParentheses" />
+	<rule ref="Formidable.CodeAnalysis.SimplifyIssetFalsyCheck" />
+	<rule ref="Formidable.CodeAnalysis.SimplifyIssetTruthyCheck" />
 </ruleset>
diff --git a/tests/phpunit/entries/test_FrmShowEntryShortcode.php b/tests/phpunit/entries/test_FrmShowEntryShortcode.php
index 94276bddf2..f5833de85f 100644
--- a/tests/phpunit/entries/test_FrmShowEntryShortcode.php
+++ b/tests/phpunit/entries/test_FrmShowEntryShortcode.php
@@ -776,7 +776,7 @@ protected function expected_plain_text_content( $atts ) {
 	}
 
 	protected function table_header( $atts ) {
-		if ( isset( $atts['plain_text'] ) && $atts['plain_text'] ) {
+		if ( ! empty( $atts['plain_text'] ) ) {
 			return '';
 		}