- strpos: documentation ( source)
- get_defined_constants: documentation ( source)
- asort: documentation ( source)
<?php
$c = array(); foreach(get_defined_constants() as $name => $value) if (strpos($name, 'IMAGETYPE') === 0) $c[$name] = $value; asort($c); foreach ($c as $name => $value) echo "$name = $value\n";