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