Online String Length Checker - PHP strlen() & mb_strlen() Tool

Execute PHP strlen and mb_strlen Online

Welcome to our online tool for executing PHP's string length functions: strlen and mb_strlen. Instantly find out the lengths of your strings, whether they’re in standard or multibyte character encoding.

How to Use the Tool

• Using strlen: Enter your string in the input box and click the "Calculate Length with strlen" button. This function returns the number of bytes in the string, which is useful for single-byte character sets.
• Using mb_strlen: To calculate the length of a multibyte string, paste your text into the designated input and click the "Calculate Length with mb_strlen" button. This function correctly counts the number of characters in a multibyte encoded string (like UTF-8).

Example of Using strlen

• Input: Hello, world!
• Length Result with strlen: 13
• Example of Using mb_strlen
• Input: Привіт, світ! (Hello, world! in Ukrainian)
• Length Result with mb_strlen: 13
• Why Use strlen and mb_strlen?
• strlen: Useful for strings using single-byte character encoding (e.g., ISO-8859-1). Returns the byte length.
• mb_strlen: Essential for handling multibyte character encodings correctly, especially for languages with special characters, ensuring accurate character counts.

Try It Now!

Simply type or paste your text into the input fields and see the results instantly. Our online tool helps you accurately determine string lengths with ease.