problem with php and regex

Question

i saw some things look a like but not the same, i hope you can assist:

i am trying to execute the first result from youtube search results by

parse youtube search result page and find this: (belong to the first video)

<img alt="Thumbnail" src="http://i4.ytimg.com/vi/kUJLn7645Zs/default.jpg">

then i want to get the video code which is this: (kUJLn7645Zs)

this is my code and something doesn't work, please assist

$res = file_get_contents("http://www.youtube.com/results?search_query=take+me");
preg_match_all('/<img\s[a-zA-Z0-9=\'\":\/.()_@&\s]*>/',$res,$matches);

$str = $matches[0][0];
$tempArray = array();
$tempArray = explode('/',$str);
echo $tempArray[count($tempArray) - 2];

Why are you using preg_match_all() if you only want the first result? — Phil
– Phil, Commented Jul 27, 2011 at 5:11
if you can use zend, using youtube api would be much lighter than loading a page — Enki
– Enki, Commented Jul 27, 2011 at 5:51

Enki · Accepted Answer · 2011-07-27 06:19:51Z

1

Why not :

if(preg_match_all('/\<img [^\>]* src\="(https?:)?\/\/i[0-9]\.ytimg\.com\/vi\/([_a-zA-Z0-9-]+)\/default\.jpg" ?[^\>]*\>/',$res,$matches))
{
  $firstVid= $matches[2][0];
}
else
{
  $firstVid= "";
}

print_r($matches);

?

edited Jul 27, 2011 at 6:19

answered Jul 27, 2011 at 5:08

Enki

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5 Comments

jhon bow Over a year ago

hey, that doesnt return a thing. did you check it?

jhon bow Over a year ago

so the regex doesnt fit. can you check again, because it doesnt help me :)

Enki Over a year ago

it was fitting with the <img /> you gave in the example, I've changed my answer so it fit also with what I get from youtube

jhon bow Over a year ago

i try this: if(preg_match_all('/\<img [^\>]* src\="(https?:)?\/\/i[0-9]+\.ytimg\.com\/vi\/([_a-zA-Z0-9-]+)\/default\.jpg" ?\>/',$res,$matches)) { $firstVid= $matches[2][0]; echo $firstVid; } else { $firstVid= ""; } still doesnt return

Enki Over a year ago

I tried from somewhere else and the code of image was <img src="http://i4.ytimg.com/vi/Cvdk7vB3jM4/default.jpg" alt="Thumbnail" > I've changed my post to match it too.

Ibu · Accepted Answer · 2011-07-27 05:08:54Z

0

it's hard to use regex to parse html.

Try using a pre-made framework like SimpleHtmlDom

answered Jul 27, 2011 at 5:08

Ibu

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Comments

Hassek · Accepted Answer · 2011-07-27 05:21:25Z

0

I would rather us

explode("/", "myvar");

And just take the part that interests me

answered Jul 27, 2011 at 5:21

Hassek

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Comments

jhon bow · Accepted Answer · 2011-07-27 13:42:10Z

0

this is the complete answer.

thank you all and a big thank you to Enki :)

$res = file_get_contents("http://www.youtube.com/results?search_query=take+me");
if(preg_match_all('/\<img [^\>]* src\="(https?:)?\/\/i[0-9]\.ytimg\.com\/vi\/([_a-zA-Z0-9-]+)\/default\.jpg" ?[^\>]*\>/',$res,$matches))
{
  $firstVid= $matches[0][0];
}
else
{
  $firstVid= "";
}

$tempArray = array();
$tempArray = explode('/',$firstVid);
echo $tempArray[count($tempArray) - 2];

answered Jul 27, 2011 at 13:42

jhon bow

1

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