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    z3n666 at gmail dot com
    16 years ago
    I was looking around and couldn't find a function that resizes images to any ratio without leaving a blank area, so i wrote this one. It's able to resize images to any size ratio, when the ratio is no match with the original it will crop proportional area on the original and resize it.

    <?php

    function _ckdir($fn) {
    if (    strpos($fn,"/") !== false) {
    $p=substr($fn,0,strrpos($fn,"/"));
    if (!    is_dir($p)) {
    _o("Mkdir: ".$p);
    mkdir($p,777,true);
    }
    }
    }
    function     img_resizer($src,$quality,$w,$h,$saveas) {
    /* v2.5 with auto crop */
    $r=1;
    $e=strtolower(substr($src,strrpos($src,".")+1,3));
    if ((    $e == "jpg") || ($e == "peg")) {
    $OldImage=ImageCreateFromJpeg($src) or $r=0;
    } elseif (    $e == "gif") {
    $OldImage=ImageCreateFromGif($src) or $r=0;
    } elseif (    $e == "bmp") {
    $OldImage=ImageCreateFromwbmp($src) or $r=0;
    } elseif (    $e == "png") {
    $OldImage=ImageCreateFromPng($src) or $r=0;
    } else {
    _o("Not a Valid Image! (".$e.") -- ".$src);$r=0;
    }
    if (    $r) {
    list(    $width,$height)=getimagesize($src);
    // check if ratios match
    $_ratio=array($width/$height,$w/$h);
    if (    $_ratio[0] != $_ratio[1]) { // crop image

    // find the right scale to use
    $_scale=min((float)($width/$w),(float)($height/$h));

    // coords to crop
    $cropX=(float)($width-($_scale*$w));
    $cropY=(float)($height-($_scale*$h));

    // cropped image size
    $cropW=(float)($width-$cropX);
    $cropH=(float)($height-$cropY);

    $crop=ImageCreateTrueColor($cropW,$cropH);
    // crop the middle part of the image to fit proportions
    ImageCopy(
    $crop,
    $OldImage,
    0,
    0,
    (int)(    $cropX/2),
    (int)(    $cropY/2),
    $cropW,
    $cropH
    );
    }

    // do the thumbnail
    $NewThumb=ImageCreateTrueColor($w,$h);
    if (isset(    $crop)) { // been cropped
    ImageCopyResampled(
    $NewThumb,
    $crop,
    0,
    0,
    0,
    0,
    $w,
    $h,
    $cropW,
    $cropH
    );
    ImageDestroy($crop);
    } else {     // ratio match, regular resize
    ImageCopyResampled(
    $NewThumb,
    $OldImage,
    0,
    0,
    0,
    0,
    $w,
    $h,
    $width,
    $height
    );
    }
    _ckdir($saveas);
    ImageJpeg($NewThumb,$saveas,$quality);
    ImageDestroy($NewThumb);
    ImageDestroy($OldImage);
    }
    return     $r;
    }

    ?>

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