Assuming that I have a string like this:
[$IMAGE[file_name|width|height]]
How can I match and obtain 2 variables
$tag = "IMAGE"
$param = "file_name|width|height"
Using a php preg_match function?
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3 Answers
$string = '[$IMAGE[file_name|width|height]]';
// Matches only uppercase & underscore in the first component
// Matches lowercase, underscore, pipe in second component
$pattern = '/\[\$([A-Z_]+)\[([a-z_|]+)\]\]/';
preg_match($pattern, $string, $matches);
var_dump($matches);
array(3) {
[0]=>
string(32) "[$IMAGE[file_name|width|height]]"
[1]=>
string(5) "IMAGE"
[2]=>
string(22) "file_name|width|height"
}
answered Dec 13, 2011 at 14:33
Michael Berkowski
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Doesn't use preg_match, but works just as well.
$var = '[$IMAGE[file_name|width|height]]';
$p1 = explode('[',$var);
$tag = str_replace('$','',$p1[1]);
$param = str_replace(']','',$p1[2]);
echo $tag.'<br />';
echo $param;
3 Comments
Michael Berkowski
+1 for workable string operations. Suggest using the 3rd param to
explode() to limit to 2 components $p1 = explode('[', $var, 2);
Alex Coplan
thanks @Michael - I tried adding that third param and the var_dump gave me a string[0] of "", and string[1] of the full string?
Alex Coplan
@Michael ah - got it, needs to be 3 not 2, as the first item in the array is an empty string
<?php
$string = '[$IMAGE[file_name|width|height]]';
preg_match("/\[\\$(.*)\[(.*)\]\]/",$string,$matches);
$tag = $matches[1];
$param = $matches[2];
echo "TAG: " . $tag;
echo "<br />";
echo "PARAM: " . $param;
?>
1 Comment
rekire
I would use
([^\]]*) to avoid greedy results.