Stripping out unwanted embed code - php

Question

I am currently looking at a piece of code for a friend and I am trying to strip out a piece of unwanted code but not sure how I can achieve what I want.
CODE:
<?php
$blah = '<iframe src="//player.vimeo.com/video/82444237" width="500" height="281"
frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
<p>KING OF THE BEASTS from
John Wiley on
Vimeo.</p>';
echo($blah);
?>
In this code the website is showing: from on
I want the start point of the input to be iframe and the endpoint to be /iframe.
Without manually making sure the iframe only is selected, any suggestions on how to achieve this?

Answer 1

Try this:
function blah($postTag)
{
//TERMINATES THE STRING AT </IFRAME>
$exploder = explode("iframe",$postTag);
//CALLS THE STRING UNTIL THE FIRST IFRAME INPUT AND CLOSES THE IFRAME TAG
$cleaned = "<iframe".$exploder[1]."iframe>";
return $cleaned;
}
$blahblah = blah('<iframe src="//player.vimeo.com/video/82444237" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p>KING OF THE BEASTS from John Wiley on Vimeo.</p>');
That should do it.

Answer 2

A simple strstr() will do the job.
<?php
$blah = '<iframe src="//player.vimeo.com/video/82444237" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p>KING OF THE BEASTS from John Wiley on Vimeo.</p>';
echo strstr($blah,'</iframe>',true)."</iframe>";
OUTPUT
<iframe src="//player.vimeo.com/video/82444237" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>

Answer 3

$blah = '<iframe src="//player.vimeo.com/video/82444237" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p>KING OF THE BEASTS from John Wiley on Vimeo.</p>';
echo substr($blah, 0, strpos($blah, '</iframe>')) ."</iframe>";
Output:
<iframe src="//player.vimeo.com/video/82444237" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>