Replace text with php using str_replace

Question

Possible Duplicate:
parse youtube video id using preg_match
Grab the video ID only from youtube's URLs

I use something like this now but i get a lot of errors...

$video_id = $_GET['url'];

$video_id = str_replace('http://www.youtube.com/watch?v=','',$video_id);
$video_id = str_replace('&feature=related','',$video_id);
$video_id = str_replace('&feature=fvwrel','',$video_id);
$video_id = str_replace('&hd=1','',$video_id);
$video_id = str_replace('&feature=relmfu','',$video_id);
$video_id = str_replace('&feature=channel_video_title','',$video_id);
$video_id = str_replace('&feature=list_related','',$video_id);
$video_id = str_replace('&playnext=1','',$video_id);
$video_id = str_replace('_player','',$video_id);

The problem is that youtube has multiple url variables for '&feature=' and maybe others

The only thing i want to extract from the youtube url is the unique video id

ex: //www.youtube.com/watch?v=lgT1AidzRWM&feature=related

and nothing after the id or before

can someone help me to get it?

@mario This question asks to use string replacement, not regex. — Kevin Ji, Nov 21 '11 at 19:38
@mc10 Only because he doesn't realize there's a safer way to go.. — Lynn Crumbling, Nov 21 '11 at 19:39
@mario you do **not** need to use `preg_match`.... (see my answer) — Naftali, Nov 21 '11 at 19:41

score 8 · Accepted Answer · answered Nov 21 '11 at 19:37

8

What you can do is this:

$url = "http://www.youtube.com/watch?v=lgT1AidzRWM&feature=related";
$p_url = parse_url($url);
parse_str($p_url['query'], $p_param);
print_r($p_param['v']);

Example: http://codepad.org/BiWKxfSZ

answered Nov 21 '11 at 19:37

Naftali

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wow! that was fast! really this was what i was looking for. i am sorry I have not thought about it. – m3tsys Nov 21 '11 at 19:39
@m3tsys your welcome ^_^ – Naftali Nov 21 '11 at 19:40

score 3 · Answer 2 · answered Nov 21 '11 at 19:37

3

$video_id = parse_url($video_id);    
parse_str($video_id['query'], $video_id);
echo $video_id['v'];

answered Nov 21 '11 at 19:37

CodeCaster

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score 1 · Answer 3 · answered Nov 21 '11 at 19:38

1

I would use regular expressions

preg_match("/v=(\w+)/", $video_id, $matches);
print_r($matches);

answered Nov 21 '11 at 19:38

Zach

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score 0 · Answer 4 · answered Nov 21 '11 at 19:39

0

You're better of using a regular expression for this. Untested:

if(preg_match('/[\?&]v=([^&]*?)/', $video_id, $match))
{
    $video_id = $match[1];
}
else exit('video id not found');

answered Nov 21 '11 at 19:39

matthiasmullie

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score 0 · Answer 5 · answered Nov 21 '11 at 19:40

0

using preg_match would be the most efficient way for this you can search the string for watch?v= up to the & or special char and place that into a variable.

this should help

http://php.net/manual/en/function.preg-match.php

answered Nov 21 '11 at 19:40

Daniel Benzie

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Replace text with php using str_replace

5 Answers5