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--TEST--
preg_replace_callback()
--FILE--
<?php
$input = "plain [indent] deep [indent] [abcd]deeper[/abcd] [/indent] deep [/indent] plain";
function parseTagsRecursive($input)
{
$regex = '#\[indent]((?:[^[]|\[(?!/?indent])|(?R))+)\[/indent]#';
if (is_array($input)) {
$input = '<div style="margin-left: 10px">'.$input[1].'</div>';
}
return preg_replace_callback($regex, 'parseTagsRecursive', $input);
}
$output = parseTagsRecursive($input);
echo $output, "\n";
?>
--EXPECT--
plain <div style="margin-left: 10px"> deep <div style="margin-left: 10px"> [abcd]deeper[/abcd] </div> deep </div> plain
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