How can PHP developers properly handle image uploads and storage to ensure efficient retrieval and display of images on a website?

To properly handle image uploads and storage in PHP, developers should validate uploaded images, store them in a secure directory, and save the file path in a database for efficient retrieval. When displaying images on a website, developers should use lazy loading techniques and optimize images for faster loading times. 

<?php
// Handle image upload
$targetDir = "uploads/";
$targetFile = $targetDir . basename($_FILES["file"]["name"]);
$uploadOk = 1;
$imageFileType = strtolower(pathinfo($targetFile, PATHINFO_EXTENSION));

// Validate image file
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["file"]["tmp_name"]);
    if($check !== false) {
        $uploadOk = 1;
    } else {
        $uploadOk = 0;
    }
}

// Store image in secure directory
if ($uploadOk == 1) {
    move_uploaded_file($_FILES["file"]["tmp_name"], $targetFile);
    // Save file path in database
    $filePath = $targetFile;
    // Insert $filePath into database for efficient retrieval
}
?>

Keywords

File upload Image storage Image retrieval PHP functions Error handling

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