CODEWITHSUNDEEP
phpregex
MarksW
MarksW

Reputation: 23

PHP regex - replace text between multiple tags with link

I have string who look like this 

A <<double>> <<tripod>> (for holding a <<plate>>, etc.) with six feet, of which three rest on the ground, in whatever position it is placed.

How can I replace it in format that everything between << >> become a link.

Result should look like this:

A <a href="search/double">double</a> <a href="search/tripod">tripod</a> (for holding a <a href="search/plate">plate</a>, etc.) with six feet, of which three rest on the ground, in whatever position it is placed.

Upvotes: 0

Views: 52

Answers (1)

Michael Krikorev
Michael Krikorev

Reputation: 2156

Something like this should work:

$str = "A <<double>> <<tripod>> (for holding a <<plate>>, etc.) with six feet, of which three rest on the ground, in whatever position it is placed.";

    preg_match_all("|<<(.*)>>|U", $str, $out, PREG_PATTERN_ORDER);

    for($i=0; $i < count($out[0]); $i++) {
        $str = str_replace($out[0][$i], '<a href="search/'. $out[1][$i] .'">'. $out[1][$i] .'</a>', $str);
    }

echo $str;

Another alternative is to use preg_replace_callback and create a recursive function:

function parseTags($input) {
    $regex = "|<<(.*)>>|U";

    if (is_array($input)) {
        $input = '<a href="search/'.$input[1].'">'.$input[1].'</a>';
    }

return preg_replace_callback($regex, 'parseTags', $input);
}

$str = "A <<double>> <<tripod>> (for holding a <<plate>>, etc.) with six feet, of which three rest on the ground, in whatever position it is placed.";

echo parseTags($str);

Upvotes: 1

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