位置: 编程技术 - 正文
PHP:imagefttext()的用法_GD库图像处理函数(php imagecopymerge)
编辑：rootadmin推荐整理分享PHP:imagefttext()的用法_GD库图像处理函数(php imagecopymerge)，希望有所帮助，仅作参考，欢迎阅读内容。
文章相关热门搜索词:php imagecopymerge,php imagestring,php imagecopymerge,php中imagecreatefromjpeg,php中imagecreatefromjpeg,php imagefill,php imagefill,php imagettftext,内容如对您有帮助，希望把文章链接给更多的朋友！
(PHP 4 >= 4.0.7, PHP 5)
imagefttext — 使用 FreeType 2 字体将文本写入图像
说明 array imagefttext ( resource $image , float $size , float $angle , int $x , int $y , int $color , string $fontfile , string $text [, array $extrainfo ] ) 参数image
由图象创建函数(例如imagecreatetruecolor())返回的图象资源。
sizeThe font size to use in points.
angleThe angle in degrees, with 0 degrees being left-to-right reading text. Higher values represent a counter-clockwise rotation. For example, a value of would result in bottom-to-top reading text.
xThe coordinates given by x and y will define the basepoint of the first character (roughly the lower-left corner of the character). This is different from the imagestring(), where x and y define the upper-left corner of the first character. For example, "top left" is 0, 0.
yThe y-ordinate. This sets the position of the fonts baseline, not the very bottom of the character.
colorThe index of the desired color for the text, see imagecolorexact().
fontfileThe path to the TrueType font you wish to use.
Depending on which version of the GD library PHP is using, when fontfile does not begin with a leading / then .ttf will be appended to the filename and the library will attempt to search for that filename along a library-defined font path.
When using versions of the GD library lower than 2.0., a space character, rather than a semicolon, was used as the &#;path separator&#; for different font files. Unintentional use of this feature will result in the warning message: Warning: Could not find/open font. For these affected versions, the only solution is moving the font to a path which does not contain spaces.
In many cases where a font resides in the same directory as the script using it the following trick will alleviate any include problems.<?php//SettheenviromentvariableforGDputenv('GDFONTPATH='.realpath('.'));//Namethefonttobeused(notethelackofthe.ttfextension)$font='SomeFont';?>
textText to be inserted into image.
extrainfoPossible array indexes for extrainfo Key Type Meaning linespacing float Defines drawing linespacing
返回值This function returns an array defining the four points of the box, starting in the lower left and moving counter-clockwise: 0 lower left x-coordinate 1 lower left y-coordinate 2 lower right x-coordinate 3 lower right y-coordinate 4 upper right x-coordinate 5 upper right y-coordinate 6 upper left x-coordinate 7 upper left y-coordinate
范例
Example #1 imagefttext() example
<?php//Createaximage$im=imagecreatetruecolor(,);$red=imagecolorallocate($im,0xFF,0x,0x);$black=imagecolorallocate($im,0x,0x,0x);//Makethebackgroundredimagefilledrectangle($im,0,0,,,$red);//Pathtoourttffontfile$font_file='./arial.ttf';//Drawthetext'PHPManual'usingfontsizeimagefttext($im,,0,,,$black,$font_file,'PHPManual');//Outputimagetothebrowserheader('Content-Type:image/png');imagepng($im);imagedestroy($im);?> 注释Note: 此函数需要 GD 2.0.1 或更高版本(推荐 2.0. 及更高版本)。
Note: 此函数仅在PHP 编译时加入 freetype 支持时有效（--with-freetype-dir=DIR）。
更新日志版本 说明 4.3.5 extrainfo was made optional.
PHP:imagegrabwindow()的用法_GD库图像处理函数 imagegrabwindow(PHP5=5.2.2)imagegrabwindowCapturesawindow说明resourceimagegrabwindow(int$window_handle[,int$client_area=0])Grabsawindoworitsclientareausingawindowshandle(HWNDpropertyinCOMinstance)
PHP:imagegrabscreen()的用法_GD库图像处理函数 imagegrabscreen(PHP5=5.2.2)imagegrabscreenCapturesthewholescreen说明resourceimagegrabscreen(void)Grabsascreenshotofthewholescreen.返回值Returnsanimageresourceidentifieronsuccess,FALSEonfailure.
PHP:imagegd()的用法_GD库图像处理函数 imagegd(PHP4=4.0.7,PHP5)imagegd将GD图像输出到浏览器或文件说明boolimagegd(resource$image[,string$filename])imagegd()将一个GD图像输出到filename。image参数是由imagecreatetrueco
