array_shift和explode有效吗？

I wonder if they disabled array_shift in > PHP 5.2.6

$realid = array_shift(explode("-", $id));

Because this code was working fine on my server PHP Version 5.2.6, while is not working in another server with higher PHP version.

If so, is there anyway I can do the following:

For a URL like this 87262-any-thing-here.html how can I get only the number, 87262, so that I will use it to call any entry from database:

$qryrec="select * from mytable where id='$realid'";
$resultrec=mysql_query($qryrec) or die($qryrec);
$linerec=mysql_fetch_array($resultrec);

Is there any way to do the same without array_shift?

Use

$realid = explode("-", $id);
$realid = $realid[0];

Edit: To obtain the decimal value at the beginning of a string, you can use sscanf:

$url = '87262-any-thing-here.html';
list($realid) = sscanf($url, '%d');

In case the URL has no decimal number at the beginning, $realid will be NULL. With explode you will get an undefined result depending on URL.

array_shift­Docs by it's function reference needs a variable:

enter image description here

(see as well: Passing by Reference)

But you give it a function:

 $realid = array_shift(explode("-", $id));

I would not expect it to always properly work because of that. Additionally this can trigger warnings and errors on some installations.

Instead use a variable:

 $ids = explode("-", $id);
 $realid = array_shift($ids);
 unset($ids);

Or in your case:

 list($realid) = explode("-", $id);

which will assing the first element of the array returned by explode to $realid. See list­Docs.