The md5() function calculate the md5 hash of a string
md5 ( string $string ,raw_output=FALSE) : string
| Parameter Name | Descrption | 
|---|---|
| $string | Required, The string. | 
| raw_output | Optional, Specifies the raw_output for hex or binary format 
 | 
When TRUE - Raw 16 bit binary format, When FALSE- 32 character hexadecimal number
echo md5('test');
//Output :: 098f6bcd4621d373cade4e832627b4f6
if(md5('test')=='098f6bcd4621d373cade4e832627b4f6')
 echo 1;
else
 echo 0;
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