PHP: md5() function
Description
The md5() function is used to calculate the md5 hash (the hash as a 32-character hexadecimal number ) of a string.
Version:
(PHP 4 and above)
Syntax:
md5(input_string, raw_output)
Parameter:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| input_string | The input string. | Required | Float |
| raw_output | Refers hex or binary output format, Returns raw 16-bit binary format if raw_output sets TRUE and return 32-bit hex format for setting FALSE (default). | Optional | Boolean |
Return value:
Returns the hash as a 32-character hexadecimal number.
Value Type: String.
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Example:
<?php
$input_string = 'Good Morning';
echo 'Original string : '.$input_string.'<br>';
echo '16 bit binary format : '.md5($input_string, TRUE).'<br>';
echo '32 bit binary format : '.md5($input_string).'<br>';
?>Output:
Original string : Good Morning 16 bit binary format : r y†” du?Û£¿ân 32 bit binary format : 72a079088694099d64753fdba3bfe26e
View the example in the browser
See also
PHP: Tips of the Day
To use the constant simply use its name:
Example:
if (EARTH_IS_FLAT) {
print "Earth is flat";
}
print APP_ENV_UPPERCASE;
Output:
or if you don't know the name of the constant in advance, use the constant function:
// this code is equivalent to the above code
$const1 = "EARTH_IS_FLAT";
$const2 = "APP_ENV_UPPERCASE";
if (constant($const1)) {
print "Earth is flat";
}
print constant($const2);
Output:
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