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46.) What is the use of the function htmlentities?
htmlentities Convert all applicable characters to HTML entities This function is identical to htmlspecialchars() in all ways, except with htmlentities(), all characters which have HTML character entity equivalents are translated into these entities. |
47.) What is the difference between $var and $$var?
They are both variables. But $var is a variable with a fixed name. $$var is a variable who's name is stored in $var. For example, if $var contains "message", $$var is the same as $message.
48.) What are the encryption techniques in PHP
MD5 PHP implements the MD5 hash algorithm using the md5 function,
eg : $encrypted_text = md5 ($msg);
mcrypt_encrypt :- string mcrypt_encrypt ( string $cipher , string $key , string $data , string $mode [, string $iv ] );
Encrypts plaintext with given parameters
49.) What is the use of "ksort" in php?
It is used for sort an array by key in reverse order.
50.) How to delete a file from the system
Unlink() deletes the given file from the file system.
They are both variables. But $var is a variable with a fixed name. $$var is a variable who's name is stored in $var. For example, if $var contains "message", $$var is the same as $message.
48.) What are the encryption techniques in PHP
MD5 PHP implements the MD5 hash algorithm using the md5 function,
eg : $encrypted_text = md5 ($msg);
mcrypt_encrypt :- string mcrypt_encrypt ( string $cipher , string $key , string $data , string $mode [, string $iv ] );
Encrypts plaintext with given parameters
49.) What is the use of "ksort" in php?
It is used for sort an array by key in reverse order.
50.) How to delete a file from the system
Unlink() deletes the given file from the file system.