function imagestringdown(&$image, $font, $x, $y, $s, $col)
{
$width = imagesx($image);
$height = imagesy($image);
$text_image = imagecreate($width, $height);
$white = imagecolorallocate ($text_image, 255, 255, 255);
$black = imagecolorallocate ($text_image, 0, 0, 0);
$transparent_colour = $white;
if ($col == $white)
$transparent_color = $black;
imagefill($text_image, $width, $height, $transparent_colour);
imagecolortransparent($text_image, $transparent_colour);
imagestringup($text_image, $font, ($width - $x), ($height - $y), $s, $col);
imagerotate($text_image, 180.0, $transparent_colour);
imagecopy($image, $text_image, 0, 0, 0, 0, $width, $height);
}
imagestringup
(PHP 4, PHP 5)
imagestringup — Draw a string vertically
說明
bool imagestringup
( resource
$image
, int $font
, int $x
, int $y
, string $string
, int $color
)
Draws a string vertically at the given
coordinates.
參數
-
image -
由影像建立函式(例如imagecreatetruecolor())回傳的影像資源。
-
font -
取值對於內建的 latin2 編碼字體可以是：1、2、3、4、5(越大數字對應越大的字體)，或是其他由 imageloadfont() 註冊的字體標示符號。
-
x -
x-coordinate of the bottom left corner.
-
y -
y-coordinate of the bottom left corner.
-
string -
The string to be written.
-
color -
A color identifier created with imagecolorallocate().
回傳值
如果成功則回傳 TRUE，失敗則回傳 FALSE。
範例
Example #1 imagestringup() example
<?php
// create a 100*100 image
$im = imagecreatetruecolor(100, 100);
// Write the text
$textcolor = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
imagestringup($im, 3, 40, 80, 'gd library', $textcolor);
// Save the image
imagepng($im, './stringup.png');
imagedestroy($im);
?>
上例的輸出類似於：
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Anonymous ¶
21 years ago
