Find ASCII code from character and Find CHARACTER from ascii code

ascii.php

<?php
#==================================
# AUTHOR - MI SHAJIB
#==================================


// find ascii code from character
echo "=====================================";
echo PHP_EOL;
echo "ASCII CODE FROM CHARACTER";
echo PHP_EOL;
echo "=====================================";
echo PHP_EOL;

$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

foreach (str_split($str) as $st) {
    echo ord($st) . "\t";
}
echo PHP_EOL;
echo PHP_EOL;

// find the character from ASCII CODE
echo "=====================================";
echo PHP_EOL;
echo "CHARACTER FROM ASCII CODE";
echo PHP_EOL;
echo "=====================================";
echo PHP_EOL;

$ascii = [65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57];

foreach ($ascii as $asc) {
    echo chr($asc) . "\t";
}

/*
output:
=====================================
ASCII CODE FROM CHARACTER
=====================================
65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90	97	98	99	100	101	102	103	104	105	106	107	108	109	110	111	112	113	114	115	116	117	118	119	120	121	122	48	49	50	51	52	53	54	55	56	57	

=====================================
CHARACTER FROM ASCII CODE
=====================================
A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z	a	b	c	d	e	f	g	h	i	j	k	l	m	n	o	p	q	r	s	t	u	v	w	x	y	z	0	1	2	3	4	5	6	7	8	9	
*/