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Definition and Usage. The strtolower () function converts a string to lowercase. Note: This function is binary-safe. Related functions: strtoupper () - converts a string to uppercase. lcfirst () - converts the first character of a string to lowercase. ucfirst () - converts the first character of a string to uppercase.
strtolower (string $string): string. Returns string with all ASCII alphabetic characters converted to lowercase. Bytes in the range "A" (0x41) to "Z" (0x5a) will be converted to the corresponding lowercase letter by adding 32 to each byte value.
The strtolower() function accepts a string and returns a new string with all alphabetic characters converted to lowercase. Here’s the syntax of the strtolower() function: strtolower ( string $string ) : string Code language: PHP ( php )
18 cze 2014 · function returnFirst($rsrnum) { $char = substr($rsrnum, 0, 1); return ctype_alpha($char) ? strtolower($char) : "#"; } Or, you can do the following: $result = strtolower( returnFirst($string) );
In this page, you will find a PHP function that converts a given string to lowercase. The function is called convertToLowercase and it takes a string as input. It uses the built-in PHP function strtolower to convert the string to lowercase.
6 lip 2023 · Then, we use the `strtolower()` function to convert the `$username` to lowercase and store the result in `$lowercaseUsername`. Finally, you can perform other operations with the lowercase username or save it in the database.
If you use this function on a unicode string without telling PHP that it is unicode, then you will corrupt your string. In particular, the uppercase 'A' with tilde, common in 2-byte UTF-8 characters, is converted to lowercase 'a' with tilde. This can be handled correctly by: $str = mb_strtolower($str, mb_detect_encoding($str));
