$_files in php code example

Example 1: php upload file

<?php
   if(isset($_FILES['image'])){
      $errors= array();
      $file_name = $_FILES['image']['name'];
      $file_size =$_FILES['image']['size'];
      $file_tmp =$_FILES['image']['tmp_name'];
      $file_type=$_FILES['image']['type'];
      $file_ext=strtolower(end(explode('.',$_FILES['image']['name'])));
      
      $extensions= array("jpeg","jpg","png");
      
      if(in_array($file_ext,$extensions)=== false){
         $errors[]="extension not allowed, please choose a JPEG or PNG file.";
      }
      
      if($file_size > 2097152){
         $errors[]='File size must be excately 2 MB';
      }
      
      if(empty($errors)==true){
         move_uploaded_file($file_tmp,"images/".$file_name);
         echo "Success";
      }else{
         print_r($errors);
      }
   }
?>

Example 2: basic code for file upload in php

//This is the minimal code for an image upload for first time learners
//html portion
<!DOCTYPE html>
<html>
<head>
	<title>ImageUpload</title>
</head>
<body>
	<form action="upload.php" method="post" enctype="multipart/form-data">
		<label>Username</label>
		<input type="text" name="username">
		<br>
		<label>UploadImage</label>
		<input type="file" name='myfile'>
		<br/>
		<input type="submit" value="upload">
	</form>
</body>
</html>
  
 //php portion
  <?php
	$user=$_POST['username'];
	$image=$_FILES['myfile'];
	echo "Hello $user <br/>";
	echo "File Name<b>::</b> ".$image['name'];

	move_uploaded_file($image['tmp_name'],"photos/".$image['name']);
	//here the "photos" folder is in same folder as the upload.php, 
	//otherwise complete url has to be mentioned
	?>

Example 3: php files

<html>

   <head>
      <title>Reading a file using PHP</title>
   </head>
   
   <body>
      
      <?php
         $filename = "tmp.txt";
         $file = fopen( $filename, "r" );
         
         if( $file == false ) {
            echo ( "Error in opening file" );
            exit();
         }
         
         $filesize = filesize( $filename );
         $filetext = fread( $file, $filesize );
         fclose( $file );
         
         echo ( "File size : $filesize bytes" );
         echo ( "<pre>$filetext</pre>" );
      ?>
      
   </body>
</html>

Example 4: how to upload image in php

<!DOCTYPE html><html><body><form action="upload.php" method="post"
enctype="multipart/form-data">    Select image to upload:    <input type="file" name="fileToUpload" id="fileToUpload">    <input type="submit" value="Upload Image" name="submit">
</form></body></html>

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