What functions can be used to access and manipulate files uploaded through a form in PHP?

To access and manipulate files uploaded through a form in PHP, you can use the $_FILES superglobal array along with various file handling functions such as move_uploaded_file() to save the file to a directory on the server, file_get_contents() to read the contents of the file, and file_put_contents() to write data to a file. 

<?php
// Check if the file was uploaded successfully
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
    $fileTmpPath = $_FILES['file']['tmp_name'];
    $fileName = $_FILES['file']['name'];
    
    // Move the uploaded file to a directory on the server
    move_uploaded_file($fileTmpPath, 'uploads/' . $fileName);
    
    // Read the contents of the uploaded file
    $fileContent = file_get_contents('uploads/' . $fileName);
    
    // Manipulate the file content if needed
    // For example, you can echo or save the content to another file
    echo $fileContent;
} else {
    echo 'File upload failed.';
}
?>

Keywords

file upload PHP form handling move_uploaded_file $_FILES

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