Data Sending Ways in PHP

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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 method is restricted to send upto 1024 characters (1024 bytes) only. You should not use GET method if you have password or other confidential information to be proceeding over the server. GET can't be used to send binary data, like images or word documents, to the server. The PHP provides $_GET associative array or super global variable to access the data sent using GET method. The POST Method The POST method transfers information via HTTP…
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Error Handling in PHP

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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 been defined. By default, such errors are not displayed to the user at all - although, as you will see, you can change this default behavior. Warnings: These are more serious errors - for example, attempting to use a file (using include() method) which does not exist. By default, these errors are displayed to the user, but they do not result in script termination. Fatal Errors: These are critical errors - for example, creating an…
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PHP – Strings Functions

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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 − <?php $txt1="Hello Readers"; $txt2="8756"; echo $txt1 . " " . $txt2; ?> Using the strlen() function The strlen() function is used to get the length of a string. <?php $txt=”Webs Jyoti”; echo strlen($txt); ?> This will produce the following result – 10 (including space) Using the strpos() function The strpos() function is used to search for a text or character within a string. If the value is found then this will return the position of…
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Working with Images – PHP

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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> Now create a PHP file process.php for handling file information <?php // get the uploaded file name $filename= $_FILES['myfile'][‘name’]; // get the file type $filetype= $_FILES['myfile'][‘type’]; // get the file size (in bytes) $filesize= $_FILES['myfile'][‘size’]; // You may put your validations here i.e restrict file size if($filesize>=1000000) { echo “ File is too Large, Maximum file size should be 1 MB”; exit; } // Validation to check if uploaded file is an Image if($filetype !=”image/jpeg”…
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Managing Sessions & Cookies

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The basic task of both cookies and sessions is to store visitor data so that it can be accessed by every page on a website. Cookies: Cookies are small text files that are stored in the visitor's browser for a specific time or for a long  -lifespan. Cookies can be edited by the visitor.  in short Cookies are client-side files that contain user information. Sessions: Sessions are small files that are stored on the website's server. Sessions have a limited lifespan, they expire when the browser is closed or logged out from the session. Sessions cannot be edited by the visitor or user. Session Max life time is 1440 Seconds(24 Minutes) as defined in php.ini file however you may change it accordingly In short, cookies serve on the visitor's computer…
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