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Checking equal number of <div> and </div> [message #171283] Thu, 30 December 2010 01:19 Go to previous message
jwcarlton is currently offline  jwcarlton
Messages: 76
Registered: December 2010
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Can you guys think of a good way for me to check a string to make sure
there are an equal number of <div (.*)> and </div>? Then, either add
or remove </div> tags as needed to make them match?

I'm sure that I could do something like this, but PHP is usually
pretty insightful so I thought there might be a better way:

// typed up for the example; obviously not in use or tested
$num_opentag = substr_count($text, '<div');
$num_closetag = substr_count($text, '</div>');

// More closed than open
if ($num_closetag > $num_opentag) {
$difference = $num_closetag - $num_opentag;
$text = preg_replace("/<\/div/i", "", $text, $difference);
}

// More open than closed
if ($num_opentag > $num_closetag) {
$difference = $num_opentag - $num_closetag;
$text = preg_replace("/<div (.*)>/i", "", $text, $difference);
}
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