chr(i)
Chinese description:
Returns the ASCII character corresponding to the integer i. The opposite effect of ord().
Parameter x: a positive number in the value range [0, 255].
Version: This function is available in all versions of python2 and python3. There are no compatibility issues.
English description:
Return a string of one character whose ASCII code is the integer i. For example, chr(97) returns the string 'a'. This is the inverse of ord(). The argument must be in the range [0..255], inclusive; ValueError will be raised if i is outside that range. The usage in php is the same