Migrating from PHP 5.3.x to PHP 5.4.x
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Backward Incompatible Changes

Although most existing PHP 5 code should work without changes, please take note of some backward incompatible changes:

The following keywords are now reserved, and may not be used as names by functions, classes, etc.

The following functions have been removed from PHP:


Migrating from PHP 5.3.x to PHP 5.4.x
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