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if statements (contains)


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It's easier to do what thorpe suggests than what you want to do.  Think about it:


With thorpe's suggestion, you need to check if the link is valid; that it fits the format you're looking for.  But, you can ensure that the iframe the link goes in is correctly formed as you'd be creating it programmatically.


With your idea, you'd need to verify that the iframe is correctly formed AND verify that the link within is also valid.  It's more work for no real gain.


Regarding output, well, how were you going to output these iframes originally?  Just take the (hopefully well-formed) iframes from the db and echo them, right?  If that's the case, then why can't you simply echo a premade iframe with the particular link variable as its source? 


EDIT: see thorpe's code above.

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