what to you think the negative aspects of PHP are? Does it poes and security threats? Tell us what you think....

I'd probably have to say that Register Globals posed as one the biggest threats, and it's self explanatory how it could of been abused.

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SESSION are also a threat if not handled correctly... that's the a term "session hijacking" was created.

PHP is new but evolving, you can't say it downsides, it's more like areas that need more research and attention.
It surely got lots of advantages over other scripting language, reasons for it's growth

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i think, PHP plus tons of plugins becomes a downside for other PHP beginners. they usually think that they need to learn all the functions in it.

One of the major downsides of PHP is its habit of throwing up back end code on to users screen. This happens mainly when there is too much usage , when it fails, it shows the code. It is the only major problem i have come across in PHP.

Despite some of the drawbacks of PHP isnt it still far more stable than ASP?