PHP chr() Function (original) (raw)

Last Updated : 21 Jun, 2023

The chr() function is a built-in function in PHP and is used to convert a ASCII value to a character. It accepts an ASCII value as a parameter and returns a string representing a character from the specified ASCII value. The ASCII value can be specified in decimal, octal, or hex values.

• Octal values are defined by a leading 0.
• Hex values are defined by a leading 0x.

The ASCII values table can be referred from here. Syntax:

string chr( $asciiVal)

Parameter: This function accepts a single parameter $asciiVal. This parameter contains a valid ASCII value. The chr() function returns the corresponding character of the ASCII value we pass to it as the parameter $asciiVal. Return Value: The function returns the character whose ASCII value we pass. Examples:

Input : ASCII=35 ASCII=043 ASCII=0x23 Output : # # # Explanation: The decimal, octal and hex value of '#' is 35, 043 and 0x23 respectively

Input : ASCII=48 Output : 0

Below programs illustrate the chr() function in PHP:Program 1: Program to demonstrate the chr() function when different ASCII are passed but their equivalent character is same.

php `

`

Output:

The equivalent character for ASCII 35 in decimal is # The equivalent character for ASCII 043 in octal is # The equivalent character for ASCII 0x23 in hex is #

Program 2: Program to demonstrate the chr() function using arrays.

php `

`

Output:

The character equivalent of ASCII value of 48 is 0 The character equivalent of ASCII value of 49 is 1 The character equivalent of ASCII value of 50 is 2