strrev() – Reversing a String in PHP
This article explains the PHP strrev() function, detailing its syntax, parameter description, return value, and provides a clear example that demonstrates how to reverse a string such as "Hello world!" using this built‑in function.
The strrev() function in PHP returns the reversed version of a given string.
Signature: string strrev(string $string) Parameter: $string – the original string to be reversed.
Return value: The function returns a new string that is the reverse of the input.
Example:
<?php
echo strrev("Hello world!");
// 输出 "!dlrow olleH"
?>The above code outputs !dlrow olleH, demonstrating the function’s effect.
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