重命名映像文件（如果服務器上已存在）PHP

Question

如果文件已存在於服務器上，我想爲文件名添加後綴。

例如：如果服務器上存在的文件image.jpg的新文件重命名爲image_1.jpg，image_2.jpg等

任何幫助，將不勝感激！

$max_file_size = 1024*100000; // 100000kb 
    $valid_exts = array('jpeg', 'jpg', 'png', 'gif'); 
    // thumbnail sizes 
    $sizes = array(250 => 150); 

    if (isset($_FILES["$fileime"])) { 
     if($_FILES["$fileime"]['size'] < $max_file_size){ 
     // get file extension 
     $ext = strtolower(pathinfo($_FILES["$fileime"]['name'], PATHINFO_EXTENSION)); 
     if (in_array($ext, $valid_exts)) { 
      /* resize image */ 
      foreach ($sizes as $width => $height) { 
      /* Get original image x y*/ 
        list($w, $h) = getimagesize($_FILES["$fileime"]["tmp_name"]); 
        /* calculate new image size with ratio */ 
        $ratio = max($width/$w, $height/$h); 
        $h = ceil($height/$ratio); 
        $x = ($w - $width/$ratio)/2; 
        $w = ceil($width/$ratio); 
        /* new file name */ 
        $path = '../thumbs/'.$_FILES["$fileime"]['name']; 
        /* read binary data from image file */ 
        $imgString = file_get_contents($_FILES["$fileime"]['tmp_name']); 
        /* create image from string */ 
        $image = imagecreatefromstring($imgString); 
        $tmp = imagecreatetruecolor($width, $height); 
        imagecopyresampled($tmp, $image, 
        0, 0, 
        $x, 0, 
        $width, $height, 
        $w, $h); 

Answer 1

爲什麼不只是在文件名的末尾添加時間戳呢？

$max_file_size = 1024*100000; // 100000kb 
    $valid_exts = array('jpeg', 'jpg', 'png', 'gif'); 
    // thumbnail sizes 
    $sizes = array(250 => 150); 

    if (isset($_FILES["$fileime"])) { 
     if($_FILES["$fileime"]['size'] < $max_file_size){ 
     // get file extension 
     $ext = strtolower(pathinfo($_FILES["$fileime"]['name'], PATHINFO_EXTENSION)); 
     if (in_array($ext, $valid_exts)) { 
      /* resize image */ 
      foreach ($sizes as $width => $height) { 
      /* Get original image x y*/ 
        list($w, $h) = getimagesize($_FILES["$fileime"]["tmp_name"]); 
        /* calculate new image size with ratio */ 
        $ratio = max($width/$w, $height/$h); 
        $h = ceil($height/$ratio); 
        $x = ($w - $width/$ratio)/2; 
        $w = ceil($width/$ratio); 
        /* new file name */ 
        $filename_array = explode('.', $_FILES["$fileime"]['name']); 
        $extension = array_pop($filename_array); 
        $new_name = implode('.',$filename_array).'_'.time().'.'.$extension; 
        $path = '../thumbs/'.$new_name; 
        /* read binary data from image file */ 
        $imgString = file_get_contents($_FILES["$fileime"]['tmp_name']); 
        /* create image from string */ 
        $image = imagecreatefromstring($imgString); 
        $tmp = imagecreatetruecolor($width, $height); 
        imagecopyresampled($tmp, $image, 
        0, 0, 
        $x, 0, 
        $width, $height, 
        $w, $h);