By using this function we can send mail from client to destination mail id, it contains four arguments To address, Subject, body and collection of headers. Number of mail related [ … ]

<?php $auth=0; if(isset($_SERVER[‘PHP_AUTH_USER’])) { $uname= $_SERVER[‘PHP_AUTH_USER’]; $pwd= $_SERVER[‘PHP_AUTH_PW’]; $fp= fopen(“users.txt”, “r”); while($line= fgets($fp)) { $arr= Explode(“:” $line); if($uname= $arr[0] and $pwd= trim($arr[1])) { $auth=1; break; } } } if($auth==0) header(“www_Authenticate: [ … ]

By using this header we can display Authentication dialog box on browser, every browser contains authentication dialog box by using this header we can display the dialog box Basic Realm: By [ … ]

It is a small amount of data packet used to transfer some data between browser and server. Along with form data if you want to send extra information between browser [ … ]

mkdir: By using this function we can create directory <?php mkdir(“abc”); ?> rmdir:  To remove the existing directory. <?php rmdir(“abc”); ?> opendir: To open contents of directory. readdir: To read the files of [ … ]

fseek: By using this function we can locate the file pointer on specified location<?php$fp= fopen(“myfile.txt”, “w+);fwrite($fp, “Scott”);fseek($fp, 3);echo fread($fp, file size(“myfile.txt”));?> fgetc: To get a character from a file.<?php$fp= fopen(“myfile.txt”, “r”);echo fgetc($fp);echo [ … ]

This concept is used to read and write the content in the file. If we want to read and write the file content first we should open that file with [ … ]

$_GET:  By using super global variable we can get the posted values of method it is array variable the total number of elements are equal to the total number of [ … ]

COOKIES SESSIONS Cookie stores data in client server Sessions store data in client server Cookie stores only limited amount of data It can store huge amount of data It is [ … ]

GET POST Get transfers Limited Amount of data Post transfers More Amount of data It is unsecured Compare with Get Post is secured It transfers only specific type of data [ … ]