Miscellaneous Functions Library: Function_exists

Source: Internet
Author: User
Keywords function_exists php Chinese function manual miscellaneous function library
Tags aliyun check function function library function_exists functions html http


(PHP3 >= 3.0.7, PHP4)

Function_exists---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Check whether the function is defined

Syntax: int function_exists (string function_name)


Checks whether the function name function_name is already defined, returns true if the given function name is found, or returns false.

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