Use PHP to extract specific string data

Question

The iframe is assigned to a variable $string. I want extract the texts between embed/ and ?rel in the iframes src. So i would be looking for this code sL-2oYAI35o

<iframe width="420" height="315" src="http://www.youtube.com/embed/sL-2oYAI35o?rel=0" frameborder="0" allowfullscreen></iframe>

Would I need to use a php substr function or regex? I cant use the regular substring because the start value may differ.

You should use regex. I don't see an embed or rel tag in the question. Can you post the whole string? — SamFisher83
– SamFisher83, Commented May 21, 2013 at 23:03

km6zla · Accepted Answer · 2013-05-21 23:17:37Z

1

I tested this and it works.

$string = preg_replace('/embed.*\?rel/', 'embed?rel', $string);

Edit thanks to @Orangepill

$string = preg_replace('/embed(.*)\?rel/', 'embed?rel', $string);

Edit 2 I tested it and it works identically with or without the capture group.

edited May 21, 2013 at 23:17

answered May 21, 2013 at 23:06

km6zla

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4 Comments

Pierce McGeough Over a year ago

Its removing the embed code alright but not assigning it to the new $string variable. How can I do this?

km6zla Over a year ago

Did you try it with the most recent edit, where it begins with the variable assignment?

Orangepill Over a year ago

Preg_match with the same pattern but put a capture group around the .*

km6zla Over a year ago

Works identically with or without capture group, I added it to edit though just inc ase others find that works for them.

Valery Viktorovsky · Accepted Answer · 2013-05-21 23:18:37Z

0

$text = '<iframe width="420" height="315" src="http://www.youtube.com/embed/sL-2oYAI35o?rel=0" frameborder="0" allowfullscreen></iframe>';

preg_match('`embed/(.+)\?rel`i', $text, $matches);
$code = (!empty($matches[1])) ? $matches[1] : '';

edited May 21, 2013 at 23:18

answered May 21, 2013 at 23:06

Valery Viktorovsky

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