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PHP String Functions

chr()

chr function to print ASCII characters , here are some examples
$string="Let us print a variable ".chr(36)."my_var"; 
Output is
Let us print a variable $my_var 
Same way we can change the string and check the outputs
echo "Let us print hash ".chr(35); //Output  Let us print hash #
echo " Less than ".chr(60);  // Output Less than <

We can use ord function to get ASCII value of any character
By using a PHP for loop we can print all the ASCII table numbers. Here is the simple code.
<?Php
$i=0;
echo "<table><tr><td>";
for($i==0;$i<=127;$i++){
echo " chr($i) = ".chr($i)."<br>"; 
if($i%20 == 0 and $i>19){echo "</td><td valign=top>";}
}
echo "</td></table>";
?>
The output of this is here
chr(0) =
chr(1) = 
chr(2) = 
chr(3) = 
chr(4) = 
chr(5) = 
chr(6) = 
chr(7) = 
chr(8) = 
chr(9) =
chr(10) =
chr(11) =
chr(12) =
chr(13) =
chr(14) = 
chr(15) = 
chr(16) = 
chr(17) = 
chr(18) = 
chr(19) = 
chr(20) = 
chr(21) = 
chr(22) = 
chr(23) = 
chr(24) = 
chr(25) = 
chr(26) = 
chr(27) = 
chr(28) = 
chr(29) = 
chr(30) = 
chr(31) = 
chr(32) =
chr(33) = !
chr(34) = "
chr(35) = #
chr(36) = $
chr(37) = %
chr(38) = &
chr(39) = '
chr(40) = (
chr(41) = )
chr(42) = *
chr(43) = +
chr(44) = ,
chr(45) = -
chr(46) = .
chr(47) = /
chr(48) = 0
chr(49) = 1
chr(50) = 2
chr(51) = 3
chr(52) = 4
chr(53) = 5
chr(54) = 6
chr(55) = 7
chr(56) = 8
chr(57) = 9
chr(58) = :
chr(59) = ;
chr(60) = <
chr(61) = =
chr(62) = >
chr(63) = ?
chr(64) = @
chr(65) = A
chr(66) = B
chr(67) = C
chr(68) = D
chr(69) = E
chr(70) = F
chr(71) = G
chr(72) = H
chr(73) = I
chr(74) = J
chr(75) = K
chr(76) = L
chr(77) = M
chr(78) = N
chr(79) = O
chr(80) = P
chr(81) = Q
chr(82) = R
chr(83) = S
chr(84) = T
chr(85) = U
chr(86) = V
chr(87) = W
chr(88) = X
chr(89) = Y
chr(90) = Z
chr(91) = [
chr(92) = \
chr(93) = ]
chr(94) = ^
chr(95) = _
chr(96) = `
chr(97) = a
chr(98) = b
chr(99) = c
chr(100) = d
chr(101) = e
chr(102) = f
chr(103) = g
chr(104) = h
chr(105) = i
chr(106) = j
chr(107) = k
chr(108) = l
chr(109) = m
chr(110) = n
chr(111) = o
chr(112) = p
chr(113) = q
chr(114) = r
chr(115) = s
chr(116) = t
chr(117) = u
chr(118) = v
chr(119) = w
chr(120) = x
chr(121) = y
chr(122) = z
chr(123) = {
chr(124) = |
chr(125) = }
chr(126) = ~
chr(127) = 

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