public static function chr(int $codepoint): string
    {
        if ($codepoint <= 0x7F) {
            return \chr($codepoint);
        }
        
        if ($codepoint <= 0x7FF) {
            return \chr(0xC0 | $codepoint >> 6) . \chr(0x80 | $codepoint & 0x3F);
        }
        
        if ($codepoint <= 0xFFFF) {
            return \chr(0xE0 | $codepoint >> 12) . \chr(0x80 | $codepoint >> 6 & 0x3F) . \chr(0x80 | $codepoint & 0x3F);
        }
        
        if ($codepoint <= 0x10FFFF) {
            return \chr(0xF0 | $codepoint >> 18) . \chr(0x80 | $codepoint >> 12 & 0x3F) . \chr(0x80 | $codepoint >> 6 & 0x3F) . \chr(0x80 | $codepoint & 0x3F);
        }
        
        throw new \InvalidArgumentException('Unable to create character for unicode codepoint ' . $codepoint);
    }
public static function chr(int $codepoint): string
    {
        if ($codepoint <= 0x7F) {
            return \chr($codepoint);
        }
        
        if ($codepoint <= 0x7FF) {
            return \chr(0xC0 | $codepoint >> 6) . \chr(0x80 | $codepoint & 0x3F);
        }
        
        if ($codepoint <= 0xFFFF) {
            return \chr(0xE0 | $codepoint >> 12) . \chr(0x80 | $codepoint >> 6 & 0x3F) . \chr(0x80 | $codepoint & 0x3F);
        }
        
        if ($codepoint <= 0x10FFFF) {
            return \chr(0xF0 | $codepoint >> 18) . \chr(0x80 | $codepoint >> 12 & 0x3F) . \chr(0x80 | $codepoint >> 6 & 0x3F) . \chr(0x80 | $codepoint & 0x3F);
        }
        
        throw new \InvalidArgumentException('Unable to create character for unicode codepoint ' . $codepoint);
    }
public static function chr ( int $ codepoint ) : string { if ( $ codepoint <= 0x7F ) { return \ chr ( $ codepoint ) ; } if ( $ codepoint <= 0x7FF ) { return \ chr ( 0xC0 | $ codepoint >> 6 ) . \ chr ( 0x80 | $ codepoint & 0x3F ) ; } if ( $ codepoint <= 0xFFFF ) { return \ chr ( 0xE0 | $ codepoint >> 12 ) . \ chr ( 0x80 | $ codepoint >> 6 & 0x3F ) . \ chr ( 0x80 | $ codepoint & 0x3F ) ; } if ( $ codepoint <= 0x10FFFF ) { return \ chr ( 0xF0 | $ codepoint >> 18 ) . \ chr ( 0x80 | $ codepoint >> 12 & 0x3F ) . \ chr ( 0x80 | $ codepoint >> 6 & 0x3F ) . \ chr ( 0x80 | $ codepoint & 0x3F ) ; } throw new \ InvalidArgumentException ( 'Unable to create character for unicode codepoint ' . $ codepoint ) ; }
Get UTF-8 character for the given codepoint

@throws \InvalidArgumentException When an invalid codepoint is given.
Get UTF - 8 character for the given codepoint