Replace deprecated preg replace e with preg replace callback

Question

result   preg replace             lt  gt     a-zA-Z0-9        0 1    a-zA-Z0-9              1    2   iseU         CallFunction    1     2     3     4     5          result      The above code gives a deprecation warning after upgrading to PHP 5 5      Deprecated  preg replace    The  e modifier is deprecated  use preg replace callback instead   How can I replace the code with preg replace callback

User · Accepted Answer

You can use an anonymous function to pass the matches to your function:

$result = preg_replace_callback(
    "/\{([<>])([a-zA-Z0-9_]*)(\?{0,1})([a-zA-Z0-9_]*)\}(.*)\{\\1\/\\2\}/isU",
    function($m) { return CallFunction($m[1], $m[2], $m[3], $m[4], $m[5]); },
    $result
);

Apart from being faster, this will also properly handle double quotes in your string. Your current code using /e would convert a double quote " into \".

[php] Replace deprecated preg_replace /e with preg_replace_callback

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