How to implement string replacement in PHP

The content of this article is to share with you how to implement string replacement in PHP. It has certain reference value. Friends in need can refer to it

substr_replace(string,replacement ,start,length)

The first parameter is: the string to be replaced (required)

The second parameter is: the specification to be replaced The string after (required)

The third parameter is: the starting position of replacement (required)

Positive number - in Replace
at the specified position in the string. Negative numbers - Replace

at the specified position from the end of the string. 0 - Replace

# at the first character in the string. ##The fourth parameter: specifies how many characters to replace (

optional)

Positive number - the length of the string to be replaced

Negative number-indicates the substring to be replaced The number of characters from the end of string to the end.

0 - Insert rather than replace

Example:

$str = '220282198801011234';
$new_str = substr_replace($str,'********',6,8);
print_r($new_str);

Print as follows:

220282* *****1234

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