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Array function Library: Count

Source: Internet
Author: User
Keywords count php Chinese function manual array function library
Tags aliyun array array function library example function function library html http
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Count

(PHP3, PHP4)

Count---Count the number of elements in a variable

Grammar: int&http://www.aliyun.com/zixun/aggregation/37954.html ">NBSP;" Count (mixed Var);

Description:

Returns the number of elements in the parameter Var, the most typical example being the number of elements in the array to be computed.

Returns 0 if the variable is not set, and returns 1 if the variable is not an array.

Warning:

When a variable is not set, count () may return 0, but when the variable begins with an empty array, it returns 0, which can be tested using isset ().

Reference: sizeof () isset () Is_array ()

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Related Keywords:
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