How to replace a string in php starting from a specified position

php method to replace a string from the specified position: first store a string in the [$str] variable; then use the [substr_replace] function to replace the string from the specified position; finally use ehco to output the replacement The result is enough.

php method to replace a string starting from the specified position:

1. Create a new php file and name it test.php, used to explain how PHP replaces strings starting from the specified position.

2. In the test.php file, use the header() method to set the encoding format of the page to utf-8 to avoid outputting Chinese garbled characters.

#3. In the test.php file, store a string "My name is XiaoMing" in the $str variable.

4. In the test.php file, use the substr_replace function to replace the string from the specified position, for example, from position 12 (the position of the string starts from 0) String starts, replaced with "MeiMei".

5. In the test.php file, use ehco to output the replacement result.

6. Open the test.php file in the browser and view the results.

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