variable containing only numbers

easethan

Is it possible to make a veriable only contain numbers(0123456789) and periods(.)? It would be great to do this without using str_replace to replace all the letters, and special characters with null, it's nearly impossible to make sure you have every character blocked.

Thanks in advance!

planetsim

$string = "asdasdasd9348239408239048asdasd";

$string = preg_replace("([a-zA-Z])","",$string);

echo $string;

Should Print Out

9348239408239048

easethan

That doesn't really work, that still leaves room for non alphanumeric characters(% & ^ Ð ! etc).

pjleonhardt

perhaps a regex to capture all numbers?, i think that would be easier than trying to kill all non numbers. could be wrong tho, im not great at regex myself

weekender

nah - there's an easy peasy way to do this - use php's type juggling or type casting to fix a variable to a certain type

//$foo is a string
$foo = "123bar";

$foo = (int) $foo;

echo $foo;
//echos 123, as $foo has been cast to an integer

i spend my free time reading man pages! sad, i know

easethan

I don't know much about regex either.

weekender

you don't need any regex - just use (int) to strip all the chars, leaving only numbers - see above!

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Weedpacket

Originally posted by weekender
you don't need any regex - just use (int) to strip all the chars, leaving only numbers - see above!

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But that will turn "asdasdasd9348239408239048asdasd" into 0, and "3.141" into 3.

This is a thread from several hours ago.
http://www.phpbuilder.com/board/showthread.php?s=&threadid=10263106 Put [^0-9.] instead of \D

weekender

damn, you're good

weed, if you were a woman, that level of knowledge/intelligence would be damn hot.

Weedpacket

Originally posted by weekender
damn, you're good

weed, if you were a woman, that level of knowledge/intelligence would be damn hot.

I know, I've known some like that. It is. 😃

pjleonhardt

hm.. didnt know you could cast things in php... ive used it in java before, but didnt know it worked here too, awesome 🙂