PHP – Fit Image Size

smartcoding, , ,

Function:
function force_width_height($width,$height,$max_width=250,$max_height=50) {

if ($width >$max_width) $over_width=true; else $over_width=false;
if ($height >$max_height) $over_height=true; else $over_height=false;

if ($over_height and $over_width)
{
return ‘width=”$max_width” height=”‘.($max_width*$height)/$width.'” ‘;
}
elseif ($over_height)
{
return ‘width=”‘.($max_height*$width)/$height.'” height=”$max_height” ‘;
}
elseif ($over_width)
{
return ‘width=”‘.$max_width.'” height=”‘.($max_width*$height)/$width.'” ‘;
}
else
{
return ‘width=”‘.$width.'” height=”‘.$height.'” ‘;
}
}

Usage (let’s say we need to fit some image to width=87px and height=65px):

$site_path = ‘/var/www/html/domain.com’; //full site path (needed to check if file exists)
$web_path = ‘domain.com’;
$image_filename = ‘/images/image.gif’; //Filename of image
if(files_exists($site_path . $image_filename)) list($width,$height)=getimagesize($image_url);
$fixed_size_attr = force_width_height($width, $height, 87, 65);
echo ‘< img src=”http://&#8217; . $web_path . $image_url.'” ‘.$fixed_size_attr.’ >’;

PHP – Fit Image Size

2 thoughts on “PHP – Fit Image Size”

  1. I hope you don’t mind but I fixed your function because it was buggy 🙂

    function force_width_height($width, $height, $max_width = null, $max_height = null) {

    if ($width >= $height) {
    $x = $width / $height;
    } else {
    $x = $height / $width;
    }
    $finalWidth = $max_height / $x;
    $finalHeight = $max_width / $x;
    if ($x == 1) {
    if ($width > $max_width) {
    if ($max_width $max_width)
    $over_width = true; else
    $over_width = false;
    if ($height > $max_height)
    $over_height = true; else
    $over_height = false;

    if ($over_height && $over_width) {
    if ($width >= $height) {
    return ‘width=”‘ . $max_width . ‘” height=”‘ . $finalHeight . ‘” ‘;
    } else {
    return ‘width=”‘ . $finalWidth . ‘” height=”‘ . $max_height . ‘” ‘;
    }
    } elseif ($over_height) {
    return ‘width=”‘ . $finalWidth . ‘” height=”‘ . $max_height . ‘” ‘;
    } elseif ($over_width) {
    return ‘width=”‘ . $max_width . ‘” height=”‘ . $finalHeight . ‘” ‘;
    } else {
    return ‘width=”‘ . $width . ‘” height=”‘ . $height . ‘” ‘;
    }
    }
    }

    it works great in combination with fitImage 🙂

  2. actually mine was buggy too 😀 here is a new version 🙂

    function force_width_height($width, $height, $max_width = null, $max_height = null) {

    $x = $width / $height ;
    if ($width > $max_width) $over_width = true; else $over_width = false;
    if ($height > $max_height) $over_height = true; else $over_height = false;

    if ($width == $height) {
    return ‘width=”‘ . $max_width . ‘” height=”‘ . $max_height . ‘” ‘;
    } else if ($width > $height){
    if ($over_height || $over_width) {
    if (($width / $max_width) > ($height / $max_height)) {
    $finalWidth = $max_width;
    $finalHeight = $finalWidth / $x;
    } else if (($width / $max_width) $width) {
    if ($over_height || $over_width) {
    if (($width / $max_width) > ($height / $max_height)) {
    $finalWidth = $max_width;
    $finalHeight = $finalWidth * $x;
    } else if (($width / $max_width) < ($height / $max_height)) {
    $finalHeight = $max_height;
    $finalWidth = $finalHeight / $x;
    } else {
    $finalWidth = $max_width;
    $finalHeight = $max_height;
    }
    return 'width="' . $finalWidth . '" height="' . $finalHeight . '" ';
    } else {
    return 'width="' . $width . '" height="' . $height . '" ';
    }
    }
    }

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