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Include Files The include (or require) statement takes all the text/code/markup that exists in the specified file and copies it into the file that uses the include statement. Including files is very useful when you want to include the same PHP, HTML, or text on multiple pages of a website.

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Example of include Welcome to my home page! Some text. Some more text.

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PHP include vs. require The require statement is also used to include a file into the PHP code. However, there is one big difference between include and require; when a file is included with the include statement and PHP cannot find it, the script will continue to execute. If we do the same example using the require statement, the echo statement will not be executed because the script execution dies after the require statement returned a fatal error.

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File and file handleing

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Simple syntax to read file in php

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File Open/Read/Close

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Create and write on File // create file $myfile = fopen("testfile.txt", "w")

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Forms and Files

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Create The Upload File PHP Script

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$Check if File Already Exists // Check if file already exists if (file_exists($target_file)) { echo "Sorry, file already exists."; $uploadOk...$

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Check if File Already Exists // Check if file already exists if (file_exists($target_file)) { echo "Sorry, file already exists."; $uploadOk = 0; }

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$Limit File Size // Check file size if ($_FILES["fileToUpload"]["size"] > 500000) { echo "Sorry, your file is too...$

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Limit File Size // Check file size if ($_FILES["fileToUpload"]["size"] > 500000) { echo "Sorry, your file is too large."; $uploadOk = 0; } //If the file is larger than 500KB, an error message is displayed

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Limit File Type // Allow certain file formats if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg" && $imageFileType != "gif" ) { echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed."; $uploadOk = 0; } //The code only allows users to upload JPG, JPEG, PNG, and GIF files. All other file types gives an error message

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Complete Upload File PHP Script (part 1)

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$Complete Upload File PHP Script (part 2) // Check if file already exists if (file_exists($target_file)) { echo "Sorry, file already...$

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Complete Upload File PHP Script (part 2) // Check if file already exists if (file_exists($target_file)) { echo "Sorry, file already exists."; $uploadOk = 0; } // Check file size if ($_FILES["fileToUpload"]["size"] > 500000) { echo "Sorry, your file is too large."; $uploadOk = 0; } // Allow certain file formats if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg" && $imageFileType != "gif" ) { echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed."; $uploadOk = 0; }

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Complete Upload File PHP Script (part 3) // Check if $uploadOk is set to 0 by an error if ($uploadOk == 0) { echo "Sorry, your file was not uploaded."; // if everything is ok, try to upload file } else { if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) { echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded."; } else { echo "Sorry, there was an error uploading your file."; } } ?>

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PHP Images from Folder

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Glob () The glob() function returns an array of filenames or directories matching a specified pattern. This function returns an array of files/directories, or FALSE on failure.

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Count () The count() function returns the number of elements in an array.

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Opendir () & Readdir () Opendir is function to open a directory Readdir is function to read files in a directory that is open

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PHP pathinfo() Function The pathinfo() function returns an array that contains information about a path. The following array elements are returned: [dirname] [basename] [extension]

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in_array () It searches for a value in an array

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PHP Error Handling

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Error Handling When creating scripts and web applications, error handling is an important part. If your code lacks error checking code, your program may look very unprofessional and you may be open to security risks. This tutorial contains some of the most common error checking methods in PHP. We will show different error handling methods: Simple "die()" statements Custom errors and error triggers Error reporting

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Example of Error Handling

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Exception handling Exception handling is used to change the normal flow of the code execution if a specified error (exceptional) condition occurs. This condition is called an exception. This is what normally happens when an exception is triggered: The current code state is saved The code execution will switch to a predefined (custom) exception handler function Depending on the situation, the handler may then resume the execution from the saved code state, terminate the script execution or continue the script from a different location in the code

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Exception handling example When an exception is thrown, the code following it will not be executed, and PHP will try to find the matching "catch" block. If an exception is not caught, a fatal error will be issued with an "Uncaught Exception" message.