PHP substr_replace () function

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• Syntax

Definition and usage

The substr_replace () function replaces one part of the string with another.

Syntax

 
Substr_replace (string, replacement, start, length)
 

Parameters	Description
String	Required. Specifies the string to be checked.
Replacement	Required. Specifies the string to be inserted.
Start	Required. Specifies where the string starts replacement. Positive number-inStartOffset start to replace Negative number-the number at the end of the stringStartOffset start to replace 0-start replacement at the first character in the string
Charlist	Optional. Specifies the number of characters to replace. Positive number-length of the string to be replaced Negative number-Number of replaced characters starting from the end of the string 0-insert instead of replace

Tips and comments

Note:IfStartIs negative andLengthLess than or equalStart, ThenLength0.

Example

  <?PHP
Echo Substr_replace("Hello world, haha","Earth",6);
?>
 
 

Output:

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 -->  Hello Earth