imagesx

(PHP 4, PHP 5)

imagesx — Obtem a largura da imagem

Descrição

int imagesx ( resource $image )

Retorna a largura do dado resource image.

Parâmetros

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

Valor Retornado

Retorna a largura da image ou FALSE em erro.

Exemplos

Exemplo #1 Usando imagesx()


<?php

// cria uma imagem de 300*200
$img = imagecreatetruecolor(300, 200);

echo imagesx($img); // 300

?>

Veja Também

imagecreatetruecolor() - Cria uma nova imagem true color
getimagesize() - Obtém o tamanho de uma imagem
imagesy() - Obtém a altura da imagem

imagesy

imagestringup

[edit] Last updated: Fri, 24 May 2013

add a note User Contributed Notes imagesx - [3 notes]

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leonardo AT saochico DOT com ¶

9 years ago


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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anC ¶

8 years ago


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'.

down

-1

kris ¶

8 years ago


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.

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