How to replace some characters in a custom string in php_PHP Tutorial

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php tutorial How to replace some characters in a custom string

The substr_replace() function replaces some characters in a custom string
Syntax: substr_replace(str,repl,start,[int length])
Grammar description:
str——Required parameter, specify the original string to be operated
repl - specifies the new string after replacement
Start——Specify the starting position of the replacement string
Length——optional parameter, specifies the length of the returned string.
Application example of using substr_replace() function to replace string:

Example code:
$b=”Manual”;
$c=”zero’s php blog”;
echo substr_replace($c,$b,9,4);
?>
Output result:
zero's php manual

Parameters

Description

string

Required. Specifies the string to check.

replacement

Required. Specifies the string to be inserted.

start

参数	描述
string	必需。规定要检查的字符串。
replacement	必需。规定要插入的字符串。
start	必需。规定在字符串的何处开始替换。 正数 - 在第 start 个偏移量开始替换 负数 - 在从字符串结尾的第 start 个偏移量开始替换 0 - 在字符串中的第一个字符处开始替换
charlist	可选。规定要替换多少个字符。 正数 - 被替换的字符串长度 负数 - 从字符串末端开始的被替换字符数 0 - 插入而非替换

Required. Specifies where in the string to begin replacement.

• Positive number - start replacing at start offset
• Negative numbers - replace at start offset from the end of the string
• 0 - Start replacement at the first character in the string

charlist

Optional. Specifies how many characters to replace.

• Positive number - the length of the string to be replaced
• Negative number - the number of characters to be replaced from the end of the string
• 0 - insert instead of replace

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php tutorial to replace some characters in a custom string method substr_replace() function to replace some characters in a custom string Syntax for replacing some characters: substr_replace(str,repl,start,[int len...