101⟩ Do you know how to delete a file from the system?
Unlink() deletes the given file from the file system.
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161 Junior PHP Developer Questions And Answers
102⟩ How to create a mysql connection in PHP?
mysql_connect(servername,username,password);
103⟩ Tell us how to set cookies in PHP?
Setcookie("PHP", "IQA", time()+3600);
104⟩ Explain what is the difference between mysql_fetch_array() and mysql_fetch_assoc()?
mysql_fetch_assoc function Fetch a result row as an associative array, While mysql_fetch_array() fetches an associative array, a numeric array, or both
105⟩ Tell me what are the functions to be used to get the image’s properties (size, width and height)?
The functions are getimagesize() for size, imagesx() for width and imagesy() for height.
106⟩ Explain 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.
107⟩ Suppose the variable $var1 is set to 10 and the $var2 is set to the character var1, what’s the value of $$var2?
$$var2 contains the value 10.
108⟩ Tell me what is the difference between ExceptiongetMessage and ExceptiongetLine?
Exception::getMessage lets us getting the Exception message and Exception::getLine lets us getting the line in which the exception occurred.
109⟩ Tell me what are the correct and the most two common way to start and finish a PHP block of code?
The two most common ways to start and finish a PHP script are:
<?php [ — PHP code—- ] ?> and
<? [— PHP code —] ?>
110⟩ Do you know what is use of count() function in php?
count() is used to count all elements in an array, or something in an object
111⟩ Tell me what is mean by an associative array?
Associative arrays are arrays that use string keys is called associative arrays.
112⟩ Tell me what does the initials of PHP stand for?
PHP means PHP: Hypertext Preprocessor.
113⟩ Tell me which function gives us the number of affected entries by a query?
mysql_affected_rows() return the number of entries affected by an SQL query.
114⟩ Do you know what is the function func_num_args() used for?
The function func_num_args() is used to give the number of parameters passed into a function.
115⟩ Tell me is it possible to protect special characters in a query string?
Yes, we use the urlencode() function to be able to protect special characters.
116⟩ Tell me are Parent constructors called implicitly inside a class constructor?
No, a parent constructor have to be called explicitly as follows:
parent::constructor($value)
117⟩ Tell me is it possible to remove the HTML tags from data?
The strip_tags() function enables us to clean a string from the HTML tags.
118⟩ Tell us how can we access the data sent through the URL with the POST method?
To access the data sent this way, you use the $_POST array.
Imagine you have a form field called ‘var’ on the form, when the user clicks submit to the post form, you can then access the value like this:
$_POST[“var”];
119⟩ Tell me what is use of in_array() function in php?
in_array used to checks if a value exists in an array
120⟩ Tell me what is the importance of "action" attribute in a html form?
The action attribute determines where to send the form-data in the form submission.
