Resize All Images from given Source

Create new file and put below code in this file.

// PHP Configuration
ini_set('memory_limit', '-1');
ini_set('max_execution_time', 30000);

//Initial settings, Just specify Source and Destination Image folder.

$file_dir = 'E:\demo image';
$save_dir_name = 'New Folder';
$fixedWidth  = 650;
$fixedHeight = 650;
$maxWidth    = 650;
$maxHeight   = 650;

check_is_dir_or_file($file_dir);

function check_is_dir_or_file($file_dir){
$files = array();
global $save_dir_name;

$folder = opendir($file_dir);

  while ( $file = readdir($folder) ) {
	  
	if ( $file[0] != '.' && $file[0] != '..' ){
	
		$dir = $file_dir.'\\'.$file;
		if(is_dir( $dir ) && $file != $save_dir_name){
			check_is_dir_or_file($dir);
		}else{
			$files[$file] = $file;
		}
	}
  }
  if($files){
	image_resize($files,$file_dir);
  }
		
}

function image_resize($files,$dir){

  global $save_dir_name, $maxWidth, $maxHeight ,$fixedWidth, $fixedHeight;

  $oldDir      = $dir;
  $newDir      = $oldDir.'\\'.$save_dir_name;
  $quality     =  100;
	
if ( !file_exists($newDir) )
    mkdir($newDir);
echo "
";
echo $oldDir;
	
	
foreach ( $files as $key => $value ) {
    $ext = strtolower(pathinfo($key, PATHINFO_EXTENSION));

    if ( $ext == 'jpg' or $ext == 'jpeg' or $ext == 'png' ) {
      if ( resizer($key, $maxWidth, $maxHeight, $fixedWidth, $fixedHeight, $oldDir, $newDir, $quality) )
        echo '*Resized image: ', $key, '*'; 
      else
        echo '** Failed to resize image: ', $key, ' **';
    } else {
	  if($key != $save_dir_name){
	      echo '** ', $key, ' is not a jpeg or png **';
	  }      
      }
  }
  
}
function resizer($fileName, $maxWidth, $maxHeight, $fixedWidth, $fixedHeight, $oldDir, $newDir, $quality) {
  $file = $oldDir.'/'.$fileName;
  //print_r($file);exit;
  $fileDest = $newDir.'/'.$fileName;
  list($width, $height) = getimagesize($file);
  if ( $fixedWidth ) {
    $newWidth  = $fixedWidth;
    $newHeight = ($newWidth / $width) * $height;
  } elseif ( $fixedHeight ) {
    $newHeight = $fixedHeight;
    $newWidth  = ($newHeight / $height) * $width;
  } elseif ( $width < $height ) {			// image is portrait
    $newHeight = $maxHeight;
    $newWidth  = ($newHeight / $height) * $width;
  } elseif ( $width > $height ) {			// image is landscape
    $newWidth  = $maxWidth;
    $newHeight = ($newWidth / $width) * $height;
  } else {						// image is square
    $newWidth  = $maxHeight;
    $newHeight = $maxHeight;
  }
  $extn = strtolower(pathinfo($file, PATHINFO_EXTENSION));
  $imageDest = imagecreatetruecolor($newWidth, $newHeight);
  // jpeg
  if ( $extn == 'jpg' or $extn == 'jpeg' ) {
    $imageSrc  = imagecreatefromjpeg($file);
    if ( imagecopyresampled($imageDest, $imageSrc, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height) ) {
      imagejpeg($imageDest, $fileDest, $quality);
      imagedestroy($imageSrc);
      imagedestroy($imageDest);
      return true;
    }
    return false;
  }
  // png
  if ( $extn == 'png' ) {
    imagealphablending($imageDest, false);
    imagesavealpha($imageDest, true);
    $imageSrc = imagecreatefrompng($file);
    if ( imagecopyresampled($imageDest, $imageSrc, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height) ) {
      imagepng($imageDest, $fileDest, ($quality / 10) - 1);
      imagedestroy($imageSrc);
      imagedestroy($imageDest);
      return true;
    }
    return false;
  }
}