text: <iframe width="853" height="480" src="http://www.youtu...
width="857" to width="720"
static(substr_replace($source, '720', 16, 3))
width="857"
function array_replace_fun($a, $tofind, $toreplace) { $i = array_search($tofind, $a); if ($i === false) { return $a; } else { $a[$i] = $toreplace; return array_replace($a, $tofind, $toreplace); } }
$newstring = str_replace('857', '720', $source)
var
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