CH_13_6.php

<?php
/**
 * フォームからファイルをアップロードする
 * Created by IntelliJ IDEA.
 * User: ishitsuka
 * Date: 13/04/30
 * Time: 15:03
 * To change this template use File | Settings | File Templates.
 */

// ファイルのアップロードフォーム
if ($_POST['_stage']) {
    // validate_form()関数がエラーを返したら、show_form()へ渡す
    if ($form_errors = validate_form()) {
        show_form($form_errors);
    }
    else {
        // サブミットされたデータが妥当ならば、それを処理
        process_form();
    }
}
else {
    // フォームはサブミットされず、表示
    show_form();
}

function show_form($errors = '') {
    if ($errors) {
        print 'You need to correct the following errors: <ul><li>';
        print implode('</li><li>', $errors);
        print '</li></ul>';
    }

    print <<<_HTML_
        <form enctype="multipart/form-data" method="POST" action="$_SERVER[PHP_SELF]">

        File to Upload: <input name="my_file" type="file" />
        <input type="hidden" name="MAX_FILE_SIZE" value="131072" />
        <input type="hidden" name="_stage" value="1" />
        <input type="submit" value="Upload" />
        </form>
_HTML_;
}

function validate_form() {
    $errors = array();
    if (($_FILES['my_file']['error'] == UPLOAD_ERR_INI_SIZE)
        || ($_FILES['my_file']['error'] == UPLOAD_ERR_FORM_SIZE)) {
        $errors[] = 'Upload file is too big.';
    }
    elseif ($_FILES['my_file']['error'] == UPLOAD_ERR_PARTIAL) {
        $errors[] = 'File upload was interrupted.';
    }
    elseif ($_FILES['my_file']['error'] == UPLOAD_ERR_NO_FILE) {
        $errors[] = 'No file uploaded.';
    }
    return $errors;
}

function process_form() {
    print "You uploaded a file called {$_FILES['my_file']['name']} ";
    print "of type {$_FILES['my_file']['size']} byte long.";

    $safe_filename = str_replace('/', '', $_FILES['my_file']['name']);
    $safe_filename = str_replace('..', '', $safe_filename);

    $destination_file = '/usr/local/uploads/' . $safe_filename;

    if (move_uploaded_file($_FILES['my_file']['tmp_name'], $destination_file)) {
        print "Successfully saved file as $destination_file.";
    }
    else {
        print "Couldn't save file in /usr/local/uploads";
    }
}