Hi Justin:
On Fri, Jul 19, 2002 at 01:50:08PM +1000, Justin French wrote:
>
> 1. look for a given tag eg DIV
> 2. capture the tag (everything from '<DIV' up to the '>')
> 3. look for a given attribute (eg ID="foo", ID=foo, ID='foo' -- all valid
> ways)
> 4. capture it
> 5. be given the opportunity to manipulate the attribute's value, delete it,
> etc
> 6. place captured tag (complete with modifed elements) back into the string
> in it's original position
> 7. return to step 1, looking for the next occurence of a DIV tag
This can be done with preg_replace() and a function. Here are some
variations on such an expression / function combo.
<?php
$Val = 'begin <div> middle <div id="idattr"> end';
function alter($var) {
return "_$var" . '_';
}
# To grab all attributes...
$Out = preg_replace('/((<div)([^>]*))/i', '\\2' . alter("\\3"), $Val);
# \\1 contains whole match
# \\2 contains tag type
# \\3 contains attributes
echo htmlspecialchars($Out);
echo '<hr />';
# To grab just the id attribute...
$Out = preg_replace('/((<div) ?(id=(?:"|\')([^\'"]*)(?:"|\'))*)/i', '\\2'
. alter("\\4"), $Val);
# \\2 contains tag type
# \\3 contains whole id attribute statement
# \\4 contains the attribute value
echo htmlspecialchars($Out);
?>
Of course, be a good hacker and modify it to suit your actual needs. :)
Enjoy,
--Dan
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