How to Batch resize images with PHP

Question

I am maintaining an old website. Now my client wants to add more than 6000 products. The product images have different sizes. I have to apply batch process. I have to resize them all to a thumb size of 230x230. Is there any way to do if from PHP? If so how?

I have to read all content from different folders which are inside a main images folders. This images folder has 40 subfolders. Each folder name is the category name and the images inside it are products (image).

if(imagecopyresampled($NewCanves, $NewImage,0, 0, 0, 0, $NewWidth, $NewHeight, $iWidth, $iHeight))
{
    // copy file
    if(imagejpeg($NewCanves,$DestImage,$Quality))
    {
        imagedestroy($NewCanves);
        return true;
    }
}

Answer 1

With php you can read the files inside a folder using

$images= glob("*"); // * will address all files
// or
$images= glob("*.jpg"); // this will address only jpg images

Then loop through $images

foreach ($images as $filename) {
   //resize the image
   if(resizeImage($imagePath,$destPath,$NewImageWidth,$NewImageHeight,$Quality)){
     echo $filename.' resize Success!<br />';
   }
}

function resizeImage($SrcImage,$DestImage, $MaxWidth,$MaxHeight,$Quality)
{
    list($iWidth,$iHeight,$type)    = getimagesize($SrcImage);

    //if you dont want to rescale image

    $NewWidth=$MaxWidth;
    $NewHeight=$MaxHeight;
    $NewCanves              = imagecreatetruecolor($NewWidth, $NewHeight);

    // Resize Image
    if(imagecopyresampled($NewCanves, $NewImage,0, 0, 0, 0, $NewWidth, $NewHeight, $iWidth, $iHeight))
     {
        // copy file
        if(imagejpeg($NewCanves,$DestImage,$Quality))
        {
            imagedestroy($NewCanves);
            return true;
        }
    }
}