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Editorial Team
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Asked: 2026-05-26T09:32:58+00:00

I need to extract an item id from a URL; the pattern is this

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I need to extract an item id from a URL; the pattern is this
&R=10031004&, I mean, I need to extract the string within &R= and the other &

This is what I have so far, but I keep getting errors.

preg_match('^[&R=]+ &$',
"http://www.lapdirecciondemario.com/items.php&R=10031004&", $matches);
$host = $matches[0];

echo $host;
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1 Answer

  1. Editorial Team
    $url = 'http://www.lapdirecciondemario.com/items.php&R=10031004&';
preg_match('/(&|\?)R=([0-9]+)/i', $url, $matches);
echo $matches[2];

    In contrast to the other answers, this will also match if the parameter R is preceded by a ? instead of a &. If you know more about the length of the number, you can replace the + after [0-9] with {min,max}.

    This regular expression should be pretty robust and match all of these:

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