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How to resize image with PHP code?

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May 30.2007

I have script to show image and need to know how to resize with code such image?

So, images are big like: 2048×1536 (this size should be original on server)

I would like to transorm with PHP or other code to 269×202

Need help.

Regards and thank you?

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PHP

16 Comments(s) ↴

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@spliffMay 30.2007 — uuuuuuuh doenst it just work with specifying width and height within <img > ??

or are you pulling a bit of html out of a database
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@toplisekauthorMay 30.2007 — Yes, I have put, it works

thank you
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@redhatlookMay 30.2007 — You want to resize 2048x1536 image with just setting 269x202 dimensions within img tag? No.. ? that is so evil idea ? ? ? because browser will still download the original large image in the situation when just a small image is needed.

Use rather some php resize function like this

http://fundisom.com/phparadise/php/image_handling/resize_offsite_image#
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@toplisekauthorMay 30.2007 — thank you. Probably this is reason that I have problem with download (in Mozilla is seen this as it would be broken image for second).

I have code in javascript like:
[code=php]
document.getElementById('selimage').innerHTML = "<img alt='My products' width='269' height='202' src='" + image + "'>";
[/code]

Is possible to read from particular directory images and show in Javascript variable?

How to do correct code?

I have some code like:
[code=php]
//set new height
$size = 150;
$src = imagecreatefromstring ($data);
$width = imagesx($src);
$height = imagesy($src);
$aspect_ratio = $height/$width;

//start resizing
if ($height <= $size)
{
$new_w = $width;
$new_h = $height;
}
else {
$new_h = $size;
$new_w = abs($new_h / $aspect_ratio);
}
[/code]
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@redhatlookMay 30.2007 — I don't know why you are using javascript there, but if you want to display small images something like thumbnails gallery use script like this...


// this is the original image

<img src="<?php echo 'image2048x1536.jpg'?>">

// this is how to display small image

<img src="<?php echo 'thumbnail.php?name=image2048x1536.jpg'?>">
[/QUOTE]
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@toplisekauthorMay 30.2007 — I have seen that it takesone second to show image in Javascript when user goes over link.

this is probably because I have very large image and in html code change to small one line width=''172''

this will not happen I assume when I make them smaller with fast download. right?
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@redhatlookMay 30.2007 — Yes... As i said ... use script for resizing like this http://fundisom.com/phparadise/php/image_handling/resize_offsite_image# modify this script to open image listed in $_GET['name'] variable, and your problem is gone.
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@toplisekauthorMay 30.2007 — How to read images from server from particular directory?
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@redhatlookMay 30.2007 — this way


fopen($_SERVER['DOCUMENT_ROOT'].'/imagesfolder/'.$_GET['name'], 'rb')
[/QUOTE]
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@toplisekauthorMay 30.2007 — What is 'rb' specification?
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@redhatlookMay 30.2007 — rb stands for [I]rubbish[/I] or [I]read binary[/I] ?

this is PHP fopen manual
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@toplisekauthorMay 30.2007 — is obligation to have?
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@redhatlookMay 30.2007 — If you do not specify the 'b' flag when working with binary files, you may experience strange problems with your data, including broken image files and strange problems with rn characters.
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@toplisekauthorMay 30.2007 — Why is in code $size = 150; ?

Where is defined new size as I need to want to resize 2048x1536 image with setting 269x202 dimensions
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@redhatlookMay 30.2007 — It seems that $size is a new height of the image so in your case 202 and width will be based on image dimension. Play around with it
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@bokehMay 30.2007 — As usual Toplisek, your posts are as captivating as your website.
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