PHP GD Functions

PALETTE IMAGE

is the designation term for images with a small number of colors.

For this type of image, a maximum of 256 colors are accepted.

TRUECOLOR IMAGE

is the designation term for images with a great number of colors.

For this type of image, a maximum of 16,777,216 colors are accepted.

This function return FALSE on errors.


<?php

int imagesy ( GdImage $image )

where,

$image = The image identifier to retrieve the height

?>

$image

The image identifier.

EXERCISE


<?php

$lang = 'en';

$tst_img = "png/PNG 006 01.png";

echo $tst_img; ?><br><br>Existing Image
<br><br><img src="<?php echo $tst_img; ?>" 
alt="<?php echo $tst_img; ?>"><br><br>

<?php

$img01 = imagecreatefrompng($tst_img);

var_dump($img01);
echo '<br><br>';

$get_h = imagesy($img01);

$en = 'HEIGHT: ';

echo $$lang . $get_h . ' px';

?>

RESULT

PNG 006 01.png

apr

HEIGHT: 245 px

EXERCISE


<?php

$lang = 'en';

$tst_img02 = "gif/GIF 008 05.gif";

echo $tst_img02; ?><br><br>Existing Image
<br><br><img src="<?php echo $tst_img02; ?>" 
alt="<?php echo $tst_img02; ?>"><br><br>

<?php

$img02 = imagecreatefromgif($tst_img02);

var_dump($img02);
echo '<br><br>';

$get_h = imagesy($img02);

$en = 'HEIGHT: ';

echo $$lang . $get_h . ' px';

?>

RESULT

GIF 008 05.gif

apr

HEIGHT: 60 px

The format of the displayed image may be different.