🗊Презентация РНР hypertext preprocessor language

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РНР hypertext preprocessor language, слайд №1РНР hypertext preprocessor language, слайд №2РНР hypertext preprocessor language, слайд №3РНР hypertext preprocessor language, слайд №4РНР hypertext preprocessor language, слайд №5РНР hypertext preprocessor language, слайд №6РНР hypertext preprocessor language, слайд №7РНР hypertext preprocessor language, слайд №8РНР hypertext preprocessor language, слайд №9РНР hypertext preprocessor language, слайд №10РНР hypertext preprocessor language, слайд №11РНР hypertext preprocessor language, слайд №12РНР hypertext preprocessor language, слайд №13РНР hypertext preprocessor language, слайд №14РНР hypertext preprocessor language, слайд №15РНР hypertext preprocessor language, слайд №16РНР hypertext preprocessor language, слайд №17РНР hypertext preprocessor language, слайд №18РНР hypertext preprocessor language, слайд №19РНР hypertext preprocessor language, слайд №20РНР hypertext preprocessor language, слайд №21РНР hypertext preprocessor language, слайд №22РНР hypertext preprocessor language, слайд №23РНР hypertext preprocessor language, слайд №24РНР hypertext preprocessor language, слайд №25РНР hypertext preprocessor language, слайд №26РНР hypertext preprocessor language, слайд №27РНР hypertext preprocessor language, слайд №28РНР hypertext preprocessor language, слайд №29РНР hypertext preprocessor language, слайд №30
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РНР hypertext preprocessor language, слайд №1
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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.
Описание слайда:
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 <!DOCTYPE html> <html> <body> <div class="menu"> <?php include 'menu.php';?> </div> <h1>Welcome to my home page!</h1> <p>Some text.</p> <p>Some more text.</p> </body> </html>
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Example of include <!DOCTYPE html> <html> <body> <div class="menu"> <?php include 'menu.php';?> </div> <h1>Welcome to my home page!</h1> <p>Some text.</p> <p>Some more text.</p> </body> </html>

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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.
Описание слайда:
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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File and file handleing

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Simple syntax to read file in php <?php echo readfile("webdictionary.txt"); ?>
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Simple syntax to read file in php <?php echo readfile("webdictionary.txt"); ?>

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File Open/Read/Close <?php $myfile = fopen("webdictionary.txt", "r") or die("Unable to open file!"); echo fread($myfile,filesize("webdictionary.txt")); fclose($myfile); ?>
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File Open/Read/Close <?php $myfile = fopen("webdictionary.txt", "r") or die("Unable to open file!"); echo fread($myfile,filesize("webdictionary.txt")); fclose($myfile); ?>

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

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РНР hypertext preprocessor language, слайд №10
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Create The Upload File PHP Script <?php $target_dir = "uploads/"; $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); $uploadOk = 1; $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); // Check if image file is a actual image or fake image if(isset($_POST["submit"])) {     $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);     if($check !== false) {         echo "File is an image - " . $check["mime"] . ".";         $uploadOk = 1;     } else {         echo "File is not an image.";         $uploadOk = 0;     } } ?>
Описание слайда:
Create The Upload File PHP Script <?php $target_dir = "uploads/"; $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); $uploadOk = 1; $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); // Check if image file is a actual image or fake image if(isset($_POST["submit"])) {     $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);     if($check !== false) {         echo "File is an image - " . $check["mime"] . ".";         $uploadOk = 1;     } else {         echo "File is not an image.";         $uploadOk = 0;     } } ?>

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Check if File Already Exists // Check if file already exists if (file_exists($target_file)) {     echo "Sorry, file already exists.";     $uploadOk = 0; }
Описание слайда:
Check if File Already Exists // Check if file already exists if (file_exists($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 large.";     $uploadOk = 0; } //If the file is larger than 500KB, an error message is displayed
Описание слайда:
Limit File Size  // Check file size if ($_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.";     $uploadOk = 0; } //The code only allows users to upload JPG, JPEG, PNG, and GIF files. All other file types gives an error message
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Limit File Type // Allow certain file formats if($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) <?php $target_dir = "uploads/"; $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); $uploadOk = 1; $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); // Check if image file is a actual image or fake image if(isset($_POST["submit"])) {     $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);     if($check !== false) {         echo "File is an image - " . $check["mime"] . ".";         $uploadOk = 1;     } else {         echo "File is not an image.";         $uploadOk = 0;     } }
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Complete Upload File PHP Script (part 1) <?php $target_dir = "uploads/"; $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); $uploadOk = 1; $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); // Check if image file is a actual image or fake image if(isset($_POST["submit"])) {     $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);     if($check !== false) {         echo "File is an image - " . $check["mime"] . ".";         $uploadOk = 1;     } else {         echo "File is not an image.";         $uploadOk = 0;     } }

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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.";     $uploadOk = 0; }
Описание слайда:
Complete Upload File PHP Script (part 2) // Check if file already exists if (file_exists($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.";     } } ?>
Описание слайда:
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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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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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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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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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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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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in_array () It searches for a value in an array

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<?php $path = "images/"; // path to images folder $file_count = count(glob($path . "*.{png,jpg,jpeg,gif}", GLOB_BRACE)); if($file_count > 0) { $fp = opendir($path); while($file = readdir($fp)) { $ext = pathinfo($file, PATHINFO_EXTENSION); $ext_array = ['png', 'jpg', 'jpeg', 'gif']; if (in_array($ext, $ext_array)) { $file_path = $path . $file;?> <div class="col-md-4 col-xs-6"> <a href="<?php echo $file_path; ?>" title="My Favorites" data-gallery><img src="<?php echo $file_path; ?>" class="img-responsive" /></a> </div> <?} } closedir($fp); } ?>
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<?php $path = "images/"; // path to images folder $file_count = count(glob($path . "*.{png,jpg,jpeg,gif}", GLOB_BRACE)); if($file_count > 0) { $fp = opendir($path); while($file = readdir($fp)) { $ext = pathinfo($file, PATHINFO_EXTENSION); $ext_array = ['png', 'jpg', 'jpeg', 'gif']; if (in_array($ext, $ext_array)) { $file_path = $path . $file;?> <div class="col-md-4 col-xs-6"> <a href="<?php echo $file_path; ?>" title="My Favorites" data-gallery><img src="<?php echo $file_path; ?>" class="img-responsive" /></a> </div> <?} } closedir($fp); } ?>

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PHP Error Handling
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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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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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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
Описание слайда:
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.
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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.

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Example of Try, throw and catch <?php //create function with an exception function checkNum($number) {   if($number>1) {     throw new Exception("Value must be 1 or below");   }   return true; } //trigger exception in a "try" block try {   checkNum(2);   //If the exception is thrown, this text will not be shown   echo 'If you see this, the number is 1 or below'; } //catch exception catch(Exception $e) {   echo 'Message: ' .$e->getMessage(); } ?>
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Example of Try, throw and catch <?php //create function with an exception function checkNum($number) {   if($number>1) {     throw new Exception("Value must be 1 or below");   }   return true; } //trigger exception in a "try" block try {   checkNum(2);   //If the exception is thrown, this text will not be shown   echo 'If you see this, the number is 1 or below'; } //catch exception catch(Exception $e) {   echo 'Message: ' .$e->getMessage(); } ?>

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