Extracting numbers from a string

[MrBelfry]

Hey everybody

litle help?

I have some strings that may look like this:

12vikki.html or 1002richie.html or 1terry.html

I would like to know how I go about parsing the string and place the numbers in another variable.

Any help or pointers will be appreciated

Thanks

MrBelfry

http://www.mrbelfry.co.uk

http://www.lighthousecc.co.uk

 

[bastienk]

regex would be the best way...otherwise look at the using string length to create a loop to move thru the string chr by chr and passing each to an array until you hit a alph chr

hth


Bastien

Cat, the other other white meat

 

[sleipnir214]

If the number-parts will always appear at the beginning of the filenames, you don't need to use regular expressions. Just typecast the variable to an integer -- PHP will stop converting the string to a number when it reaches the first non-numeric character. The script:

<?php
$a = '12vikki.html';
$b = (int) $a;
print $b;
?>

returns "12" on my LAMP machine.

Likewise, you can strip floating-point numbers. This script:

<?php
$a = '12.25vikki.html';
$b = (float) $a;
print $b;
?>

Returns "12.25" on my LAMP box.

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[MrBelfry]

Thanks Guys

The numbers will always appear at the beginning of the string so Sleipnir's solution is the one I'll use.

Once again Tek-Tip's has made my job easier

Thanks

MrBelfry

http://www.mrbelfry.co.uk

http://www.lighthousecc.co.uk

 

[skiflyer]

Here's the manuals explanation of this in case you ever need to take it another step.

http://www.php.net/manual/en/language.types.string.php#language.types.string.conversion