Tag: free php tutorials

Unset() function means in php?

The behavior of unset()  inside of a function can vary depending on what type of variable you are attempting to destroy. If a globalized variable is unset() inside of a function, only the local variable is destroyed. The variable in the calling environment will retain the same value as before unset()  was called. Example <?php […]

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Difference between require() and require_once()?

The require() and require_once() functions perform same work. Both functions will include and evaluates the specific file while executing the code. if include() is not able to find a specified file on location at that time it will throw a warning however, it will not stop script execution. For the same scenerio require() will throw […]

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Multiple inheritance in PHP?

Inheritance is a well-established programming principle, and PHP makes use of this principle in its object model. This principle will affect the way many classes and objects relate to one another. For example, when you extend a class, the subclass inherits all of the public and protected methods from the parent class. Unless a class […]

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Data Sending Ways in PHP

There are some certain ways to send your information or data to the PHP page- Using Form Methods – Get & Post Using Cookies & Session Using Query String / URL Rewriting Using Hidden form fieldForm MethodsThe GET Method: The GET method sends information separated by the ? Operator.Example: http://www.xyz.com/home.html?city=Gurgaon Please note that the GET […]

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PHP – Strings Functions

String functions are the most important functions frequently used in PHP. String is the sequence of characters, like “Let’s learn String functions”. There is no installation required to use string function. Example <?php $name = “Hirdesh Bhardwaj”; print($name); ?> String Concatenation Operator To concatenate two string variables together, we use the dot (.) operator − […]

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Working with Images – PHP

We need to create an HTML form that allows you to choose the file to be uploaded. Note: please make sure you have form method type is post and enctype=”mutipart/form-data” to to handle file uploading process successfully. HTML Code <form enctype=”multipart/form-data” action=”process.php” method=”POST”> Choose File : <input name=”myfile” type=”file” /> <input type=”submit” value=”Upload” /> </form> […]

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Data types in Mysql / Mariadb

Numeric Data Types: INT (Integer): Int data type represents an integer of normal size. So simply it can used to store numeric value. There are also BIGINT, MEDIUMINT, SMALLINT and TINYINT which represent different range of integer values. DECIMAL: Decimal data type represents numbers with specific floating values. Maximum permitted value is 65 and maximum […]

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The do-while loop

Difference Between while and do…while Loop: With a while loop, the condition to be evaluated is tested at the beginning of each loop statement, so if the conditional expression evaluates to false, the loop will never be executed. With a do-while loop, on the other hand, the loop will always be executed once, even if […]

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