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PHP : Function Reference : Image Functions : imagesx

imagesx

Get image width (PHP 4, PHP 5)
int imagesx ( resource image )

Returns the width of the given image resource.

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

Return Values

Return the width of the image or FALSE on errors.

Examples

Example1024.Using imagesx()

<?php

// create a 300*200 image
$img = imagecreatetruecolor(300, 200);

echo
imagesx($img); // 300

?>


Related Examples ( Source code ) » imagesx



Code Examples / Notes » imagesx

anc

You can't convert pixels into centimeters or something else, atleast without knowing the resolution and the size of your screen and the viewrange of it. For example: The pixels on monitor that's resolution is 1024*768 and size is 17' the size of a pixel is smaller than on the monitor that's resolution is 1024*768 too but size is 21'.

kris

You can in fact convert pixels to CM or to whatever measurement you want if you know the DPI and current resolution of the image.  This will of course give you the real life print size of the image and not the actual on screen size of the image.  
This function seems to have been created for such a purpose.  It is for this reason the creator of the function passes the DPI and resolution to his function.


leonardo

This function convert image size of Pixel to Centimeter
<?
#$imagem - source of image
#$dpi - resolution to convert E.g.: 72dpi or 300dpi
function px2cm($image, $dpi) {
#Create a new image from file or URL
$img = ImageCreateFromJpeg($image);
#Get image width / height
$x = ImageSX($img);
$y = ImageSY($img);

#Convert to centimeter
$h = $x * 2.54 / $dpi;
$l = $y * 2.54 / $dpi;

#Format a number with grouped thousands
$h = number_format($h, 2, ',', ' ');
$l = number_format($l, 2, ',', ' ');

#add size unit
$px2cm[] = $h."cm";
$px2cm[] = $l."cm";

#return array w values
#$px2cm[0] = X
#$px2cm[1] = Y
return $px2cm;
}
$image = "C:\\inetpub\\wwwroot\\lab\\trata_img\\l0gik.jpg";
$dpi = 300;
$result = px2cm($image, $dpi);
print ($result[0]." x ".$result[1]);
?>


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