Find new proportional dimensions of an image in PHP -


i have site , want upload image , resize because have put div dimension.

for example max-width 200px , max-height 100px

i want upload image , check width , height, if bigger max-width or max-height want find size of image stay inside div.

how can resize proportionally size of image? want find new width , new height in base of div 200px*100px

this script:

            if(move_uploaded_file($tmp, $path.$actual_image_name))             {                 list($width, $height, $type, $attr) = getimagesize($tmp);                 if($width>200){                     //too large want resize                 }                 if($height>100){                     //too height want resize                 }                 echo(base_url().$path.$actual_image_name);             }

you can use function below stay inside bounding box. eg 200x200. send in filelocation , max width , height. return array $ar[0] new width , $ar[1] new height.

its written out in full can understand math.

<?php function returnsize($maxw,$maxh,$img) {     $maxw = ($maxw>0 && is_numeric($maxw)) ? $maxw : 0;     $maxh = ($maxh>0 && is_numeric($maxh)) ? $maxh : 0;      // file , new size     if (!file_exists($img)) {         $size[0]=0;         $size[1]=0;         return $size;     }      $size = getimagesize($img);      if ($maxw>0 && $maxh>0) {         if ($size[0]>$maxw) {             $scalew = $maxw / $size[0];         } else {             $scalew = 1;         }          if ($size[1]>$maxh) {             $scaleh = $maxh / $size[1];         } else {             $scaleh = 1;         }          if ($scalew > $scaleh) {             $filew = $size[0] * $scaleh;             $fileh = $size[1] * $scaleh;         } else {             $filew = $size[0] * $scalew;             $fileh = $size[1] * $scalew;         }      } else if ($maxw>0) {         if ($size[0]>$maxw) {             $scalew = $maxw / $size[0];         } else {             $scalew = 1;         }          $filew = $size[0] * $scalew;         $fileh = $size[1] * $scalew;      } else if ($maxh>0) {         if ($size[1]>$maxh) {             $scaleh = $maxh / $size[1];         } else {             $scaleh = 1;         }          $filew = $size[0] * $scaleh;         $fileh = $size[1] * $scaleh;      } else {         $filew = $size[0];         $fileh = $size[1];     }      $size[0] = $filew;     $size[1] = $fileh;      return $size; } ?>

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