irreplacable PHP Substr_replace will specify that the characters between the two positions be replaced by the number

Copy CodeThe code is as follows:

$username = "Zongzi";
Echo substr_replace ($username, ' * * ', ' 1 ', ' 2 ');

Definition and usage

The Substr_replace () function replaces part of a string with another string.

Grammar

Substr_replace (String,replacement,start,length)

Parameters	Description
String	Necessary. Specifies the string to check.
Replacement	Necessary. Specifies the string to insert.
Start	Necessary. Specifies where the string begins to be replaced. Positive number-starts with the first offset Negative number-replaces the start offset starting at the end of a string 0-Start the substitution at the first character in the string
Charlist	Optional. Specifies the number of characters to replace. Positive number-The length of the string being replaced Negative-the number of characters to be replaced starting at the end of the string 0-Insert rather than replace

Hints and Notes

Note: If start is negative and length is less than or equal to start, length is 0.
Example

Copy the Code code as follows:

Echo substr_replace ("Hello World", "Earth", 6);
?>

Output:
Hello Earth

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