How to correctly implement PHP to generate a unique identifier _ PHP Tutorial

Correctly implement PHP to generate a unique identifier. Today, we will introduce in detail the sample code for generating a unique identifier in PHP :? Generate the unique identifier sha1 () function. the security hash algorithm (SHA1) functioncreate_uniq is related

Sample code for generating a unique identifier in PHP:

1. <?
2. // Generate a unique identifier
3. // Sha1 () function, "security hash algorithm (SHA1 )"
4. Function create_unique (){
5. $ Data = $ _ SERVER ['http _ USER_AGENT ']. $ _ SERVER ['remote _ ADDR']
6. . Time (). rand ();
7. Return sha1 ($ data );
8. // Return md5 (time (). $ data );
9. // Return $ data;
10. }
11. ?>

Function description and example for generating unique identifiers in PHP

 
 

  
  
< ? 
  
  
$newhash = create_unique(); 
  
  
echo $newhash; 
  
  
?> 
  
  
 
 
 

Example code for generating unique identifiers in login PHP :? // Generate the unique identifier // sha1 () function, security hash algorithm (SHA1) functioncreate_uniq...