imagechar

(PHP 4, PHP 5)

imagechar — Draw a character horizontally

Popis

bool imagechar ( resource $image, int $font, int $x, int $y, string $c, int $color )

imagechar() draws the first character of c in the image identified by image with its upper-left at x,y (top left is 0, 0) with the color color.

Seznam parametrů

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
font: Can be 1, 2, 3, 4, 5 for built-in fonts (where higher numbers corresponding to larger fonts) or any of your own font identifiers registered with imageloadfont().
x: x-coordinate of the start
y: y-coordinate of the start
c: The character to draw
color: A color identifier created with imagecolorallocate()

Návratové hodnoty

Vrací TRUE při úspěchu, FALSE při selhání.

Příklady

Příklad 776. imagechar() example


<?php



$im = imagecreate(100, 100);



$string = 'PHP';



$bg = imagecolorallocate($im, 255, 255, 255);

$black = imagecolorallocate($im, 0, 0, 0);



// prints a black "P" in the top left corner

imagechar($im, 1, 0, 0, $string, $black);



header('Content-type: image/png');

imagepng($im);



?>

Výše uvedený příklad vypíše něco jako:

Viz také

imagecharup()

imageloadfont()

add a note User Contributed Notes
imagechar

sw at profilschmiede dot de
20-Jun-2005 08:35


For the sake of completeness, here is an example for imagechar. 

The base-image automatically adjusts to the size and the height of the given string. Using the rand()-function the y-position of each char is slightly varied with every loop-run. You can easily rewrite the script to use a randomly generated string - the one given here just serves as an example.



<?php



$string = '1 2 3 4 5 6 7 8 9 A B C D E F G';

$font_size = 5;

$width=imagefontwidth($font_size)*strlen($string);

$height=imagefontheight($font_size)*2;

$img = imagecreate($width,$height);

$bg = imagecolorallocate($img,225,225,225);

$black = imagecolorallocate($img,0,0,0);

$len=strlen($string);



for($i=0;$i<$len;$i++)

{

    $xpos=$i*imagefontwidth($font_size);

    $ypos=rand(0,imagefontheight($font_size));

    imagechar($img,$font_size,$xpos,$ypos,$string,$black);

    $string = substr($string,1);    

    

}

header("Content-Type: image/gif");

imagegif($img); 

imagedestroy($img);

?>

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imagecharup

imagearc

Last updated: Sat, 24 Mar 2007