位置: 编程技术 - 正文
PHP:imageftbbox()的用法_GD库图像处理函数(php imagettftext)
编辑：rootadmin推荐整理分享PHP:imageftbbox()的用法_GD库图像处理函数(php imagettftext)，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 img src,php imagettftext,php中imagecreatefromjpeg,php imagecopymerge,php imagecopy,php imagefill,php image,php imagefill,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)
imageftbbox — 给出一个使用 FreeType 2 字体的文本框
说明 array imageftbbox ( float $size , float $angle , string $fontfile , string $text [, array $extrainfo ] )This function calculates and returns the bounding box in pixels for a FreeType text.
参数size
字体的尺寸。根据 GD 的版本，为像素尺寸（GD1）或点（磅）尺寸（GD2）。
angleAngle in degrees in which text will be measured.
fontfileThe name of the TrueType font file (can be a URL). Depending on which version of the GD library that PHP is using, it may attempt to search for files that do not begin with a leading &#;/&#; by appending &#;.ttf&#; to the filename and searching along a library-defined font path.
text
The string to be measured.
extrainfoPossible array indexes for extrainfo Key Type Meaning linespacing float Defines drawing linespacing
返回值imageftbbox() returns an array with 8 elements representing four points making the bounding box of the text: 0 lower left corner, X position 1 lower left corner, Y position 2 lower right corner, X position 3 lower right corner, Y position 4 upper right corner, X position 5 upper right corner, Y position 6 upper left corner, X position 7 upper left corner, Y position
The points are relative to the text regardless of the angle, so "upper left" means in the top left-hand corner seeing the text horizontally.
范例
Example #1 imageftbbox() example
<?php//Createaximage$im=imagecreatetruecolor(,);$black=imagecolorallocate($im,0,0,0);$white=imagecolorallocate($im,,,);//Setthebackgroundtobewhiteimagefilledrectangle($im,0,0,,,$white);//Pathtoourfontfile$font='./arial.ttf';//Firstwecreateourboundingbox$bbox=imageftbbox(,0,$font,'ThePHPDocumentationGroup');//ThisisourcordinatesforXandY$x=$bbox[0]+(imagesx($im)/2)-($bbox[4]/2)-5;$y=$bbox[1]+(imagesy($im)/2)-($bbox[5]/2)-5;imagefttext($im,,0,$x,$y,$black,$font,'ThePHPDocumentationGroup');//Outputtobrowserheader('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:imagegammacorrect()的用法_GD库图像处理函数 imagegammacorrect(PHP4,PHP5)imagegammacorrect对GD图像应用gamma修正说明boolimagegammacorrect(resource$image,float$inputgamma,float$outputgamma)imagegammacorrect()函数用给定的输入gamma
PHP:imagefontwidth()的用法_GD库图像处理函数 imagefontwidth(PHP4,PHP5)imagefontwidth取得字体宽度说明intimagefontwidth(int$font)返回指定字体一个字符宽度的像素值。参见imagefontheight()和imageloadfont()。
PHP:imagefilledarc()的用法_GD库图像处理函数 imagefilledarc(PHP4=4.0.6,PHP5)imagefilledarc画一椭圆弧且填充说明boolimagefilledarc(resource$image,int$cx,int$cy,int$width,int$height,int$start,int$end,int$color,int$style)在指定的image
标签: php imagettftext
本文链接地址:https://www.jiuchutong.com/biancheng/288340.html 转载请保留说明！
](https://www.jiuchutong.com/image/20240129/1706494846.jpg)
