CODEWITHSUNDEEP
phpregex
Burhan Ali
Burhan Ali

Reputation: 39

Regular expression matching in content

I want to match the following string with a regular expression:

$string ="test string [% code content ='test content' class ='myclass' %]";

I want to extract the class and content from this string in percentage braces. Iam using this pattern for matching

$regex_pattern = "/[% ?.*](.*)[\/%]/";
preg_match_all($regex_pattern,$content,$matches);

but not getting the output that I require.

Upvotes: 0

Views: 51

Answers (2)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626861

You can use the regex to capture contents and class values regardless of their positions inside the [% ... %]:

(?:content|class)\s*='([^']+?)'(?=(?:(?!\[\%|\%\]).)*?\%\])

See demo.

<?php
    $re = "/(?:content|class)\\s*=\\s*'([^']+?)'(?=(?:(?!\\[\\%|\\%\\]).)*?\\%\\])/"; 
    $str = "test string [% code content ='test content' class ='myclass' %]"; 
    preg_match_all($re, $str, $matches);
    echo $matches[1][0] . "\n";
    echo $matches[1][1] . "\n";
?>

Here is a sample program.

Output:

test content                                                                                                                                                                                                                                           
myclass

Upvotes: 1

Avinash Raj
Avinash Raj

Reputation: 174706

Here you need to use \G anchor since you're trying to grab some contents from a block [%..%].

(?:\[%|(?<!^)\G).*?(content|class)\s*='([^']*)'(?=(?:(?!\[%|%\]).)*?%])

DEMO

Example:

$s = "content ='outside content' test string [% code content ='test content' class ='myclass' %]";
preg_match_all("~(?:\[%|(?<!^)\G).*?\K(content|class)\s*='([^']*)'(?=(?:(?!\[%|%\]).)*?%])~", $s, $matches);
print_r($matches);

Output:

Array
(
    [0] => Array
        (
            [0] => content ='test content'
            [1] => class ='myclass'
        )

    [1] => Array
        (
            [0] => content
            [1] => class
        )

    [2] => Array
        (
            [0] => test content
            [1] => myclass
        )

)

Upvotes: 1

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