81⟩ Explain what is the function file_get_contents() usefull for?
file_get_contents() lets reading a file and storing it in a string variable.
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161 Junior PHP Developer Questions And Answers
82⟩ Tell me what is the actually used PHP version?
Version 5 is the actually used version of PHP.
83⟩ Tell me what is the use of "ksort" in php?
It is used for sort an array by key in reverse order.
84⟩ Tell me how stop the execution of a php scrip?
exit() function is used to stop the execution of a page
85⟩ Do you know how to declare an array in php?
Eg : var $arr = array('apple', 'grape', 'lemon');
86⟩ Tell me how to Retrieve a Cookie Value?
eg : echo $_COOKIE["user"];
87⟩ Tell me what is the use of isset() in php?
This function is used to determine if a variable is set and is not NULL
88⟩ Tell me how to get the value of current session id?
session_id() function returns the session id for the current session.
89⟩ Tell me what is needed to be able to use image function?
GD library is needed to be able execute image functions.
90⟩ Tell me how is it possible to know the number of rows returned in result set?
The function mysql_num_rows() returns the number of rows in a result set.
91⟩ Tell me how is it possible to return a value from a function?
A function returns a value using the instruction ‘return $value;’.
92⟩ Tell me how to initiate a session in PHP?
The use of the function session_start() lets us activating a session.
93⟩ Tell me what does $_ENV means?
$_ENV is an associative array of variables sent to the current PHP script via the environment method.
94⟩ Explain what does the expression Exception__toString means?
Exception::__toString gives the String representation of the exception.
95⟩ Do you know is it possible to extend the execution time of a php script?
The use of the set_time_limit(int seconds) enables us to extend the execution time of a php script. The default limit is 30 seconds.
96⟩ Tell me what the difference between the ‘BITWISE AND’ operator and the ‘LOGICAL AND’ operator?
$a and $b: TRUE if both $a and $b are TRUE.
$a & $b: Bits that are set in both $a and $b are set.
97⟩ Explain what does $_FILES means?
$_FILES is an associative array composed of items sent to the current script via the HTTP POST method.
98⟩ Tell me in PHP, objects are they passed by value or by reference?
In PHP, objects passed by value.
99⟩ Tell me how do I check if a given variable is empty?
If we want to check whether a variable has a value or not, it is possible to use the empty() function.
100⟩ Tell me what is the main difference between PHP 4 and PHP 5?
PHP 5 presents many additional OOP (Object Oriented Programming) features.
