Tag: php coaching classes in gurgaon

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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Error Handling in PHP

Error handling is the process of catching errors from the program and then taking appropriate action. Before proceeding for error handling you should get to know how many types of errors occurred in PHP. Notices: These are non-critical errors that occurred while executing a script – for example, accessing a variable that has not yet […]

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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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Require () and Include () function in PHP

The Include() and require() statements are used to insert codes written in other files, in the flow of  execution. The main of using include and require functions to integrate one page code or content into another page. You can maintain usually some repeated functionality in the form of PHP file and finally you can call […]

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Introduction to Ajax

Ajax (Asynchronous Java script And XML)  Introduction In Jesse Garrett’s original article that coined the term, it was AJAX. The “X” in AJAX really stands for XML HTTP Request though, and not XML. Jesse later conceded that Ajax should be a word and not an acronym and updated his article to reflect his change in heart. So “Ajax” […]

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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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