What is the use of str_replace() PHP String function?

str_replace() searches a string for some text and replaces it with new text. It replaces all matches.

<?php
echo str_replace("Hello", "Hi", "Hello World, Hello PHP");
?>

Output:

It is case-sensitive. For a case-insensitive replace use str_ireplace(). See more examples in how to replace a part of a string in PHP.

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