_php tutorial for Chr (ASCII) and ord (string) function usage in PHP

The functions of these two functions are exactly the opposite of the CHR function, which returns characters from the specified ASCII value and the Ord () function returns the ASCII value of the first character of the string. Understand that this function is useful for everyone.

See the Chr function First

The CHR () function returns characters from the specified ASCII value.

Chr (ASCII)

The ASCII parameter can be in decimal, octal, or hexadecimal. The octal system is specified by the pre-set, and the hexadecimal is specified by the front 0x

Example

The code is as follows	Copy Code
Echo Chr (52); Echo Chr (052); echo Chr (0x52); ?> output: 4 * R

is not very magical, in fact, it is not my fault that I often do not see the code with CHR to operate as

The code is as follows	Copy Code
Echo Chr (13); Echo Chr (32); ?>

Let's figure out what this will do, and the result is

A carriage return, a space

Let's look at the Ord function .

The Ord () function returns the ASCII value of the first character of a string.

From above, it's just the opposite of Chr.

Grammar

The code is as follows	Copy Code
Ord (String) Example Echo Ord ("H"); echo ord ("Hello"); ?> Output Result: 104 104

Okay, now let's look at a comprehensive example

The code is as follows	Copy Code
$str 1=CHR (88); echo $str 1; The return value is X $str 2=CHR (Ord (X) +1); // echo $str 2; The return value is Y echo "T"; $str 3=ord (' S '); echo $str 3; The return value is 83 ?>

Here is an article about the PHP Ord function and Chinese garbled solution

For more detailed information, please see: http://www.bKjia.c0m/phper/php-function/php-ord.htm

http://www.bkjia.com/PHPjc/631668.html www.bkjia.com true http://www.bkjia.com/PHPjc/631668.html techarticle The functions of these two functions are exactly the opposite of the CHR function, which returns characters from the specified ASCII value and the Ord () function returns the ASCII value of the first character of the string. Understand that this function is useful for everyone. ...

