Using preg_split on alpha-numeric string in PHP

Question

Consider the string 12345aaa. I want to use preg_split() on it so only the numeric part of it will be returned (i.e. 12345). How would I write the regex for it ?

Yacoby · Accepted Answer · 2009-12-30 12:26:08Z

5

preg_split is not the function you want, you want preg_match as you don't want to split a string into parts, but to retrieve part of it. As I don't know more details, I can only provide a rough example of how to do it.

$reg = null;
//match the first set of 1 or more numbers
if ( preg_match('/\d+/', $str, $reg) ){
    $num = $reg[0];
}

edited Dec 30, 2009 at 12:26

answered Dec 30, 2009 at 1:14

Yacoby

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1 Comment

Geert Over a year ago

No need to wrap \d+ in parentheses. Use $reg[0]. It contains the full match.

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