How can you pass a variable by reference?
To be able to pass a variable by reference, we use an ampersand in front of it, as follows $var1 = &$var2
How is a constant defined in a PHP script?
The define() directive lets us defining a constant as follows: define ("TESTCONSTANT", 100);
Which cryptographic extension provide generation and verification of digital signatures?
The PHP-OpenSSL extension provides several cryptographic operations including generation and verification of digital signatures.
What is the most convenient hashing method to be used to hash passwords?
It is preferable to use crypt() which natively supports several hashing algorithms or the function hash() which supports more variants than crypt() rather than using the common hashing algorithms such…
How is it possible to return a value from a function?
A function returns a value using the instruction ‘return $value;’.
How can we define a variable accessible in functions of a PHP script?
This feature is possible using the global keyword.
what is the static variable in function useful for?
A static variable is defined within a function only the first time, and its value can be modified during function calls as follows: <?php function testFunction() { static $testVariable =…
Is it possible to remove the HTML tags from data?
The strip_tags() function enables us to clean a string from the HTML tags.
What does the function get_magic_quotes_gpc() means?
The function get_magic_quotes_gpc() tells us whether the magic quotes is switched on or no.
How can we automatically escape incoming data?
We have to enable the Magic quotes entry in the configuration file of PHP.