Preg_match

How can I preg_match the alt value for each of these?

Thanks in advance.

<li><img src="yes/0.bmp" alt="0" /></li>

<li><img src="yes/7.bmp" alt="7" /></li>

<li><img src="yes/0.bmp" alt="0" /></li>

<li><img src="yes/4.bmp" alt="4" /></li>

<li><img src="yes/0.bmp" alt="0" /></li>

<li><img src="yes/0.bmp" alt="0" /></li>

<li><img src="yes/0.bmp" alt="0" /></li>

$tag = "<img src=\"yes/0.bmp\" alt=\"1\" />";
$matches = array();
echo preg_match("/alt=\"[0-9]{1,2}\"/", $tag, $matches);
echo '<pre>';
print_r($matches)
echo '</pre>';

That worked for me, only registers alts that are in the range of 1-2 characters, ie up to 99, though that can easily be changed in the expression.

Returns:

alt="1"

Another way would be this:

$html = '

<li><img src="yes/0.bmp" alt="0" /></li>
<li><img src="yes/7.bmp" alt="7" /></li>
<li><img src="yes/0.bmp" alt="0" /></li>
<li><img src="yes/4.bmp" alt="4" /></li>
<li><img src="yes/0.bmp" alt="0" /></li>
<li><img src="yes/0.bmp" alt="0" /></li>
<li><img src="yes/0.bmp" alt="0" /></li> 

';

preg_match_all("/alt=\"(.*?)\"/", $html, $matches);

var_dump($matches);

..which outputs...

array
  0 => 
    array
      0 => string 'alt="0"' (length=7)
      1 => string 'alt="7"' (length=7)
      2 => string 'alt="0"' (length=7)
      3 => string 'alt="4"' (length=7)
      4 => string 'alt="0"' (length=7)
      5 => string 'alt="0"' (length=7)
      6 => string 'alt="0"' (length=7)
  1 => 
    array
      0 => string '0' (length=1)
      1 => string '7' (length=1)
      2 => string '0' (length=1)
      3 => string '4' (length=1)
      4 => string '0' (length=1)
      5 => string '0' (length=1)
      6 => string '0' (length=1)