Tutorials

PHP String chr() Function

Posted in PHP Tutorial

Updated on Jan 16, 2024

By Mari Selvan

👁️ 29 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In PHP, strings play a crucial role in handling textual data, and various functions are available to manipulate and work with strings.

The chr() function is one such function that converts an ASCII code to its corresponding character.

In this tutorial, we'll explore the usage and functionality of the chr() function in PHP.

💡 Syntax

The signature of the chr() function is as follows:

Syntax

Copied

string chr(int $ascii);

$ascii: An integer representing the ASCII code of the desired character.

📄 Example

Let's delve into an example to illustrate how the chr() function works.

chr.php

Copied

<?php

// ASCII code for the letter 'A'
$asciiCode = 65;

// Convert ASCII code to character using chr()
$character = chr($asciiCode);

// Output the result
echo "Character: $character\n";

?>

💻 Output

Output

Character: A

🧠 How the Program Works

In this example, the chr() function converts the ASCII code 65 (which corresponds to the letter 'A') to the actual character and prints the result.

↩️ Return Value

The chr() function returns a string containing the character represented by the ASCII code.

📚 Common Use Cases

The chr() function is particularly useful when you need to convert ASCII codes to characters dynamically. It is commonly used in scenarios where you want to generate strings based on ASCII values or manipulate individual characters.

📝 Notes

Ensure that the provided ASCII code is within the valid range (0 to 127) to get meaningful results.
The chr() function is the inverse of ord(), which converts a character to its ASCII code.

🎢 Optimization

The chr() function is optimized for converting ASCII codes to characters. However, for performance-critical applications, optimization is usually not necessary due to the function's lightweight nature.

🎉 Conclusion

The chr() function in PHP is a handy tool for converting ASCII codes to characters. It provides a straightforward and efficient way to work with individual characters, enhancing the versatility of your PHP scripts.

Feel free to experiment with different ASCII codes and explore the behavior of the chr() function in various scenarios. Happy coding!