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String function Library: Count_chars

Source: Internet
Author: User
Keywords count_chars php Chinese Function Handbook
Tags aliyun count_chars function function library html http information php
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Count_chars

(PHP4 >= 4.0b4)

Count_chars---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Returns information about the characters used in a string

Syntax: Mixed Count_chars (String string [, Mode])

Description:

Calculates the number of occurrences of each byte-value (0..255) in the parameter string, and returns it in various ways, depending on the parameter mode (preset 0) to determine how the Count_chars () is passed back.

0-Returns an array whose index value is Byte-value and the value of the array is the number of occurrences per bit

1-Same as 0, but only byte-value greater than 0 are listed

2-and 0 is the same, but only byte-value equal to zero will be listed

3-Returns all strings using Byte-value

4-Returns all strings that do not use Byte-value

Note: This function is a new function in PHP4.0

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