Изменить размер изображения перед загрузкой

Question

Я искал простой скрипт для загрузки изображений. Я нашел interesting one, но я не знаю, как его изменить, чтобы изменить размер изображения перед загрузкой.

Вот PHP код:

if (isset($_POST['submit'])) { 
    $validextensions = array("jpeg", "jpg", "png"); 
    $temporary = explode(".", $_FILES["file"]["name"]); 
    $file_extension = end($temporary); 
    if ((($_FILES["file"]["type"] == "image/png") || ($_FILES["file"]["type"] ==  "image/jpg") || ($_FILES["file"]["type"] == "image/jpeg")) && ($_FILES["file"]["size"] < 100000)//Approx. 100kb files can be uploaded. 
     && in_array($file_extension, $validextensions)) { 
     if ($_FILES["file"]["error"] > 0) { 
      echo "Return Code: " . $_FILES["file"]["error"] . "<br/><br/>"; 
     } else { 
      echo "<span>Your File Uploaded Succesfully...!!</span><br/>"; 
      echo "<br/><b>File Name:</b> " . $_FILES["file"]["name"] . "<br>"; 
      echo "<b>Type:</b> " . $_FILES["file"]["type"] . "<br>"; 
      echo "<b>Size:</b> " . ($_FILES["file"]["size"]/1024) . " kB<br>"; 
      echo "<b>Temp file:</b> " . $_FILES["file"]["tmp_name"] . "<br>"; 
      if (file_exists("upload/" . $_FILES["file"]["name"])) { 
       echo $_FILES["file"]["name"] . " <b>already exists.</b> "; 
      } else { 
       move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]  ["name"]); 
       echo "<b>Stored in:</b> " . "upload/" . $_FILES["file"]["name"]; 
      } 
     } 
    } else { 
     echo "<span>***Invalid file Size or Type***<span>"; 
    } 
} 

Answer 1

Это очень надежная процедура.

Он изменяет размеры, создает, размер предварительного просмотра, и создает миниатюру

выбирает также лучший лучший тип ПИК и сохраняет большой и эскиз как base64 <img>

$thumbWidth = 60; 
$thumbHeight = 60; 
$previewWidth = 80; 
$previewHeight = 60; 
$bigWidth = 320; 
$bigHeight = 240; 

if(is_uploaded_file($_FILES['image1']['tmp_name']) || !($_FILES['image1']['error'] !== UPLOAD_ERR_OK)){ 
    $save = false; 
    $jspan = ''; 
    $gspan = ''; 
    $pspan = ''; 
    switch(strtolower($_FILES['image1']['type'])){ 
    case 'image/jpeg': 
    $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']); 
    if ($image !== false){$save = true;break;} 
    case 'image/png': 
    $image = @imagecreatefrompng($_FILES['image1']['tmp_name']); 
    if ($image !== false){$save = true;break;} 
    case 'image/gif': 
    $image = @imagecreatefromgif($_FILES['image1']['tmp_name']); 
    if ($image !== false){$save = true;break;} 
    default: 
    $img = @getimagesize($_FILES['image1']['tmp_name']); 
    switch(strtolower($img['mime'])){ 
    case 'image/jpeg': 
     $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
    case 'image/png': 
     $image = @imagecreatefrompng($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
    case 'image/gif': 
     $image = @imagecreatefromgif($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
    default: 
     $filename = $_FILES['image1']['name']; 
     $ext = substr($filename,-3); 
     switch(strtolower($ext)){ 
     case 'jpg': 
     $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
     case 'gif': 
     $image = @imagecreatefromgif($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
     case 'png': 
     $image = @imagecreatefrompng($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
     default: 
     $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
     $image = @imagecreatefrompng($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
     $image = @imagecreatefromgif($_FILES['image1']['tmp_name']); 
     if ($image !== false){$save = true;break;} 
     } 
    } 
    } 
} 
if ($save === true){ 
    $originalWidth = imagesx($image); 
    $originalHeight = imagesy($image); 
    $scale  = min($previewWidth/$originalWidth, $previewHeight/$originalHeight); 
    $newWidth = ceil($scale*$originalWidth); 
    $newHeight = ceil($scale*$originalHeight); 
    $newPic = imagecreatetruecolor($newWidth, $newHeight); 
    imagecopyresampled($newPic, $image,0, 0, 0, 0,$newWidth, $newHeight, $originalWidth, $originalHeight); 
    ob_start(); 
    imagejpeg($newPic, NULL, 70); 
    $jpg = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $jLen = strlen($jpg); 
    ob_start(); 
    imagepng($newPic, NULL, 9); 
    $png = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $pLen = strlen($png); 
    ob_start(); 
    imagegif($newPic); 
    $gif = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $gLen = strlen($gif); 
    if ($gLen < $jLen){ 
    if ($pLen < $gLen){ 
     $raw = $png; 
     $png = null; 
     $type = 'png'; 
     $pspan = '<span class="size">'; 
    } 
    else{ 
     $raw = $gif; 
     $gif = null; 
     $type = 'gif'; 
     $gspan = '<span class="size">'; 
    } 
    } 
    elseif($pLen < $jLen){ 
    $raw = $png; 
    $png = null; 
    $type = 'png'; 
    $pspan = '<span class="size">'; 
    } 
    else{ 
    $raw = $jpg; 
    $jpg = null; 
    $type = 'jpg'; 
    $jspan = '<span class="size">'; 
    } 
    $base64 = base64_encode($raw); 
    $thumb1 = "#thumb1{background-image:url('data:image/$type;base64,$base64')}"; 
    $size = 'Thumb'; 
    echo "<p>Image $num $size <br>$jspan jpg: $jLen bytes</span>, <br>$gspan gif: $gLen bytes</span>, <br>$pspan png: $pLen bytes</span></p> $thumb1"; 
    $filename = 'thumb1.' . $type; 
    $fp = fopen($filename ,"w"); 
    fwrite($fp, $raw); 
    fclose($fp); 
    imagedestroy($newPic); 
    $filename = "thumb1_$type.html"; 
    $fp = fopen($filename ,"w"); 
    fwrite($fp, $thumb1); 
    fclose($fp); 
    $thumb1 = mysql_escape_string($thumb1); 
    @mysql_unbuffered_query("UPDATE `photos` SET `thumb1`='$thumb1' WHERE `id`=$id"); 
    $scale  = min($bigWidth/$originalWidth, $bigHeight/$originalHeight); 
    $newWidth = ceil($scale*$originalWidth); 
    $newHeight = ceil($scale*$originalHeight); 
    $newPic = imagecreatetruecolor($newWidth, $newHeight); 
    imagecopyresampled($newPic, $image,0, 0, 0, 0,$newWidth, $newHeight, $originalWidth, $originalHeight); 
    ob_start(); 
    imagejpeg($newPic, NULL, 70); 
    $jpg = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $jLen = strlen($jpg); 
    ob_start(); 
    imagepng($newPic, NULL, 9); 
    $png = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $pLen = strlen($png); 
    ob_start(); 
    imagegif($newPic); 
    $gif = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $gLen = strlen($gif); 
    if ($gLen < $jLen){ 
    if ($pLen < $gLen){ 
     $raw = $png; 
     $png = null; 
     $type = 'png'; 
     $pspan = '<span class="size">'; 
    } 
    else{ 
     $raw = $gif; 
     $gif = null; 
     $type = 'gif'; 
     $gspan = '<span class="size">'; 
    } 
    } 
    elseif($pLen < $jLen){ 
    $raw = $png; 
    $png = null; 
    $type = 'png'; 
     $pspan = '<span class="size">'; 
    } 
    else{ 
    $raw = $jpg; 
    $jpg = null; 
    $type = 'jpg'; 
    $jspan = '<span class="size">'; 
    } 
    $base64 = base64_encode($raw); 
    $size = 'Full Size'; 
    $filename = 'big1.' . $type; 
    $big1 = "<img width=\"$newWidth\" height=\"$newHeight\" src=\"data:image/$type;base64,$base64\" alt =\"profile photo one\"/>"; 
    echo "<p>Image $num $size <br>$jspan jpg: $jLen bytes</span>, <br>$gspan gif: $gLen bytes</span>, <br>$pspan png: $pLen bytes</span></p> $big1"; 
    $fp = fopen($filename ,"w"); 
    fwrite($fp, $raw); 
    fclose($fp); 
    imagedestroy($newPic); 
    $filename = "big1_$type.html"; 
    $fp = fopen($filename ,"w"); 
    fwrite($fp, $big1); 
    fclose($fp); 
    $big1 = mysql_escape_string($big1); 
    @mysql_unbuffered_query("UPDATE `photos` SET `big1`='$big1' WHERE `id`=$id"); 
    $scale  = min($thumbWidth/$originalWidth, $thumbHeight/$originalHeight); 
    $newWidth = ceil($scale*$originalWidth); 
    $newHeight = ceil($scale*$originalHeight); 
    $newPic = imagecreatetruecolor($newWidth, $newHeight); 
    imagecopyresampled($newPic, $image,0, 0, 0, 0,$newWidth, $newHeight, $originalWidth, $originalHeight); 
    ob_start(); 
    imagejpeg($newPic, NULL, 70); 
    $jpg = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $jLen = strlen($jpg); 
    ob_start(); 
    imagepng($newPic, NULL, 9); 
    $png = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $pLen = strlen($png); 
    ob_start(); 
    imagegif($newPic); 
    $gif = ob_get_clean(); 
    ob_clean(); 
    ob_end_flush(); 
    $gLen = strlen($gif); 
    if ($gLen < $jLen){ 
    if ($pLen < $gLen){ 
     $raw = $png; 
     $png = null; 
     $type = 'png'; 
    } 
    else{ 
     $raw = $gif; 
     $gif = null; 
     $type = 'gif'; 
    } 
    } 
    elseif($pLen < $jLen){ 
    $raw = $png; 
    $png = null; 
    $type = 'png'; 
    } 
    else{ 
    $raw = $jpg; 
    $jpg = null; 
    $type = 'jpg'; 
    } 
    $base64 = base64_encode($raw); 
    $size = 'Small Thumb'; 
    $filename = 'smallThumb.' . $type; 
    $smallThumb = "#t$id{margin:0;display:inline-block;width:60px;height:60px;border:0;background-image: background-image:url('data:image/gif;base64,$base64');}"; 
    echo '<div style="height:60px;width:60px;background-repeat: no-repeat;background-image:background-image:url(' . "'data:image/gif;base64,$base64');\" ></div>\n"; 
    echo "<br/><p>Image $num $size <br/>jpg: $jLen bytes<br>gif: $gLen bytes<br/>png: $pLen bytes</p> "; 
    $fp = fopen($filename ,"w"); 
    fwrite($fp, $raw); 
    fclose($fp); 
    imagedestroy($image); 
    imagedestroy($newPic); 
    $filename = "smallThumb$type.html"; 
    $fp = fopen($filename ,"w"); 
    fwrite($fp,'<!DOCTYPE html><html lang="en"><head><style>' . $smallThumb . '</style></head><body><div id="t9542058256"></div></body></html>'); 
    fclose($fp); 
    $smallThumb = mysql_escape_string($smallThumb); 
    @mysql_unbuffered_query("UPDATE `photos` SET `SmallThumb`='$smallThumb' WHERE `id`=$id"); 

}