Use preg_match to split resolution variable

[tangledman]

I am still trying to get the hang of my regexs

Say I have the variable

$screen_resolution=1024x768;

How do I use preg_match to give me the width and the height from the variable.

I reckon it is something like;

$str='1024x768';

preg_match('^[0-9]+$x', $str, $matches);

echo "$matches"; 

thanks

[Jake Arkinstall]

$String = '1024x768';
$Height = $Width = 0;
If(Preg_Match('/^(\d+)x(\d+)$/', $String, $Matches)){
    $Height = $Matches[1];
    $Width = $Matches[2];
}
echo 'Height: ' . $Height . '<br />Width: ' . $Width; 

\d is a digit, it can be 0-9 (so [0-9] is the same as \d). With preg you still need delimiters at the beginning and end. $Matches is an array, the key 0 being the whole match (1024x768), key 1 being the first bracketed section (1024) and key2 being the second bracketed section (768).

[tangledman]

That has to be the fastest reply ever...thanks v much.

[logic_earth]

*headshakes*

$str = '1024x768';
list( $width, $height ) = preg_split( '/[xX]/', $str, -1, 1 );
// or
$str = '1024x768';
list( $width, $height ) = explode( 'x', $str ); 

[Jake Arkinstall]

5 whole minutes!!! I'm getting slow :P

Though I did have to start up my web server to test the code before I submitted it...



@Logic:
$str = 'helloxhello';

using explode or preg_split doesn't allow for number verification.
Width: Hello
Height: Hello.

[logic_earth]

...Though I did have to start up my web server to test the code before I submitted it...

You should think about getting an editor or IDE that can run a CLI instance of PHP to test run scripts.

@Logic:
$str = 'helloxhello';

using explode or preg_split doesn't allow for number verification.
Width: Hello
Height: Hello.

That is why you run checks on the value.
Could as easily run those checks like this:

$str = '1024x768';
@list( $width, $height ) = preg_split( '/[xX]/', $str, -1, 1 );

if ( !isset( $width, $height ) )
    // Somethig bad!

settype( $width, 'int');
settype( $height, 'int' ); 

Or even:

$arr = preg_split( '/[xX]/', $str, -1, 1 );
$arr = array_pad( array_filter( $arr, 'ctype_digit' ), 2, 0 ); 

So many ways.

[Salathe]

Or even:

sscanf($str, '%dx%d', $width, $height);