PHP functions checker code

<?php
if (function_exists('imap_open')) {
    echo "IMAP functions are available.<br />\n";
} else {
    echo "IMAP functions are not available.<br />\n";
}
if (function_exists('dir')){
    echo "dir functions are available.<br />\n";
} else {
    echo "dir functions are not available.<br />\n";
}
if (function_exists('readdir')) {
        echo "readdir functions are available.<br />\n";
} else {
    echo "readdr functions are not available.<br />\n";
}

if (function_exists('opendir')) {
        echo "opendir functions are available.<br />\n";
} else {
    echo "opendir functions are not available.<br />\n";
}
if (function_exists('eval')) {
        echo "eval functions are available.<br />\n";
} else {
    echo "eval functions are not available.<br />\n";
}
if (function_exists('exec')) {
        echo "exec functions are available.<br />\n";
} else {
    echo "exec functions are not available.<br />\n";
}
if (function_exists('set_time_limit')) {
        echo "set time limit functions are available.<br />\n";
} else {
    echo "set time limits functions are not available.<br />\n";
}
if (function_exists('ini_alter')) {
        echo "ini_alter functions are available.<br />\n";
} else {
    echo "ini_alter functions are not available.<br />\n";
}
if (function_exists('ini_set')) {
        echo "ini_set functions are available.<br />\n";
} else {
    echo "ini_set functions are not available.<br />\n";
}
if (function_exists('ini_restore')) {
        echo "ini_restore functions are available.<br />\n";
} else {
    echo "ini_restore functions are not available.<br />\n";
}
if (function_exists('php_uname')) {
        echo "php_uname functions are available.<br />\n";
} else {
    echo "php_uname functions are not available.<br />\n";
}
if (function_exists('popen')) {
        echo "popen functions are available.<br />\n";
} else {
    echo "popen functions are not available.<br />\n";
}
if (function_exists('proc_close')) {
        echo "proc_close functions are available.<br />\n";
} else {
    echo "proc_close functions are not available.<br />\n";
}
if (function_exists('proc_get_status')) {
        echo "proc_get_status functions are available.<br />\n";
} else {
    echo "proc_get_status functions are not available.<br />\n";
}
if (function_exists('proc_open')) {
        echo "proc_open functions are available.<br />\n";
} else {
    echo "proc_open functions are not available.<br />\n";
}
if (function_exists('shell_exec')) {
        echo "shell_exec functions are available.<br />\n";
} else {
    echo "shell_exec functions are not available.<br />\n";
}
if (function_exists('system')) {
        echo "system functions are available.<br />\n";
} else {
    echo "system functions are not available.<br />\n";
}
?>