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PHP Manual Example


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According to the PHP manual, the following code should produce "Matched".


$string = "sense and sensibility";

if (preg_match("/(sens|respons)e and \1ibility/", $string)){
echo "Matched";
else {
echo "No match made";

But it doesn't.  It tells me, No match made.  Anyone tell me if I'm missing something here?  Have I overlooked something obvious.  Can I only use back referencing in certain versions of PHP?

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