imagecharup()

(PHP 4, PHP 5, PHP 7)

垂直地画一个字符

说明

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

imagecharup()将字符$c垂直地画在$image指定的图像上，位于$x，$y（图像左上角为 0, 0），颜色为$color。如果$font为 1，2，3，4 或 5，则使用内置的字体。

imagecharup()例子

<?php
$im = imagecreate(100,100);
$string = 'Note that the first letter is a N';
$bg = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
// prints a black "Z" on a white background
imagecharup($im, 3, 10, 10, $string, $black);
header('Content-type: image/png');
imagepng($im);
?>

参见imagechar()和imageloadfont()。

<?php
// incredibly, no one has added this.
// write a string of text vertically on an image..
// ;o)
$string = '(c) corz.org';
$font_size = 2;
$img = imagecreate(20,90);
$bg = imagecolorallocate($img,225,225,225);
$black = imagecolorallocate($img,0,0,0);
$len = strlen($string);
for ($i=1; $i<=$len; $i++) {
  imagecharup($img, $font_size, 5, imagesy($img)-($i*imagefontwidth($font_size)), $string, $black);
  $string = substr($string,1);
}
header('Content-type: image/png');
imagepng($img);
imagedestroy($img); // dudes! don't forget this!
?>