Detailed explanation of the use of mb_strstr in php

This time I will bring you a detailed explanation of the use of mb_strstr in php. What are the precautions when using mb_strstr in php. The following is a practical case, let's take a look.

Preface

This article mainly introduces the relevant content about the basic use of mb_strstr in php, and shares it for your reference. Learning, I won’t say much more below, let’s take a look at the detailed introduction.

mb_strstr

• ##(PHP 5 >= 5.2.0, PHP 7)

• mb_strstr — Finds first occurrence of a string within another

• Finds the first occurrence of a string within another string

Description

string mb_strstr ( 
 string $haystack , 
 string $needle [, 
 bool $before_needle = false [, 
 string $encoding =mb_internal_encoding() ]] 
 )
//mb_strstr() finds the first occurrence of needle in haystack and returns the portion of haystack. If needle is not found, it returns FALSE.
//mb_strstr() 查找了 needle 在 haystack 中首次的出现并返回 haystack 的一部分。 如果 needle 没有找到，它将返回 FALSE。

Parameters

##haystack

The string from which to get the first occurrence of needle

• The string from which to get the first occurrence of needle.

• needle

The string to find in haystack

• Find this string in haystack .

• before_needle

Determines which portion of haystack this function returns. If set to TRUE, it returns all of haystack from the beginning to the first occurrence of needle (excluding needle). If set to FALSE, it returns all of haystack from the first occurrence of needle to the end (including needle).

• Determine this

  function
Which part of the haystack is returned. If set to TRUE, it returns all characters in haystack from the beginning to the occurrence of needle (excluding needle). If set to FALSE, it returns all characters from the last occurrence of needle in haystack (including needle).

• encoding

##Character encoding name to use. If it is omitted, internal character encoding is used.

• The character encoding name to use. If this parameter is omitted, the internal character encoding will be used.

• Return Values

Returns the portion of haystack, or FALSE if needle is not found.

• Return part of haystack, or return FALSE if needle is not found.

• Examples

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