linkgraph not show image

[ya-zero]

please add to Prerequisites php-xml , need for show image linkusage(linkgraph.php)

[ya-zero]

i'm sory. in install script installAS-Stats.sh i'm find list moduless need .
yum install -y httpd httpd-devel php php-gd phpimap php-ldap php-odbc php-pear php-xml php-xmlrpc php-mcrypt curl curl-devel perl-libwwwperl libxml2 php-mbstring rrdtool perl-rrdtool