Stripping characters from a variable

[globex]

Hello,

 

I have a variable which holds two numbers separated by an 'x'. Like this: 100x100, or 80x34 or 480x12. How do I:

 

a) strip the first number and the x to get just the second number

b) strip the x and the last number to get just the first number

 

I'm very new at PHP so some details and simple explanations would be fantastic. Or maybe just point me in the direction of the proper documentation page.

Thanks.

[redarrow]

substr

 

www.php.net

[redarrow]

<?php

$num="100x100";
$result=substr($num,0,3);
echo "$result<br>";

$num="100x100";
$result=substr($num,4,7);
echo "<br>$result";
?>

[bwochinski]

<?php
$num = 480x12

$numbers = explode("x",$num);

echo "First Number: ".$numbers[0];
echo "<br />";
echo "Second Number: ".$numbers[1];
?>

[mbtaylor]

Yup, I'd use explode too

[redarrow]

both do the same, the  both  code examples are as equel as each over and are set as the  same speed for a php string function.

[bwochinski]

Except that using substr wont parse his 80x34 example.

[chrisuk]

does substr() not need a static length? as in that example will it assume its always, for example, 123x456 ie. 3 numbers, then x, then 3 numbers?

 

So it wouldn't work for 4 numbers, or 2 numbers

 

I would also use explode personally.

[mbtaylor]

Amen to Chris.

 

If you used substr with strpos you could find the position of the X and use that, but you would still have to call it twice one to get the beginning and one for the end whereas explode does it in one line and I believe is a simpler way to do it.

[globex]

Thanks a lot. Explode works like a charm.