PHP returns the character function chr() from the specified ASCII value

Example

Return characters from different ASCII values:

<?php
echo chr(52) . "<br>"; // Decimal value
echo chr(052) . "<br>"; // Octal value
echo chr(0x52) . "<br>"; // Hex value
?>

Definition and usage

chr() FunctionReturns characters from the specified ASCII value.

ASCII values ​​can be specified as decimal, octal, or hexadecimal values. Octal values ​​are defined with leading 0 and hexadecimal values ​​are defined with leading 0x.

Syntax

chr(ascii)

Parameters	Description
ascii	Required. ASCII value.

Technical details

Return value:	Returns the specified character.
PHP version:	4+

##More examples

Use octal values 046 to add the ASCII character: &.

<?php
$str = chr(046);
echo("You $str me forever!");
?>

Example 2

Use decimal values ​​43 and 61 to add ASCII characters: + and =.

<?php 
$str = chr(43);
$str2 = chr(61);
echo("2 $str 2 $str2 4"); 
?>

The chr() function is opposite to the ord() function and is used to return the specified character, such as chr(97) returns a.

Combined with the above example, as long as the ASCII value of the Chinese character is obtained, the Chinese character can be loaded through the chr() function
Array, the code is as follows

$string = "不要迷恋哥"; 
$length = strlen($string); 
var_dump($string);//原始中文 
var_dump($length);//长度 
$result = array(); 
for($i=0;$i<$length;$i++){ 
if(ord($string[$i])>127){ 
$result[] = ord($string[$i]).&#39; &#39;.ord($string[++$i]); 
} 
} 
var_dump($result); 
foreach($result as $v){ 
$decs = explode(" ",$v); 
echo chr($decs[0]).chr($decs[1]); 
}

The above code does not directly output Chinese characters, but prints out normal Chinese characters. The principle is to first obtain the ASCII value of each byte, convert it into bytes through the chr() function, and then convert the two bytes The combination forms a complete Chinese character.

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