[PHP] Glob issue

REcently in our php error log we have been seeing

[15-Jul-2015 07:16:39 America/Edmonton] PHP Fatal error: Call to undefined function glob() in /var/www/docs/foreachtest.phtml on line 2


And the foreachtest.phtml read


<?php
foreach (glob("*.html") as $filename) {
echo "$filename size " . filesize($filename) . "\n";
}
?>


What is happening?

Using php 5.6.11 on Apache 2.2 latest.

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