<?php
function imageAddText($path, $content, $x = 'auto', $y = 'auto', $fontSize = 38, $font = './t.ttf'){
$temp = array(1=>'gif', 2=>'jpeg', 3=>'png');
// 获取图片信息
$imageInfo = getimagesize($path);
$imageType = $temp[$imageInfo[2]];
$getfunc = "imagecreatefrom$imageType";
$outfunc = "image$imageType";
$resource = $getfunc($path);
$width = imagesx($resource);
$height = imagesy($resource);
$color = imagecolorallocatealpha($resource, 255, 255, 255, 0);
$fontBox = imagettfbbox($fontSize, 0, $font, $content);//文字水平居中实质
if ($x === 'auto'){
$x = ceil(($width - $fontBox[2]) / 2);
}
if ($y === 'auto'){
$y = ceil(($height - $fontBox[1] - $fontBox[7]) / 2);
}
imagettftext($resource, $fontSize, 0, $x, $y, $color, $font, $content);
/*输出图片*/
//浏览器输出
header("Content-type:".$imageType);
$outfunc($resource);
}
// 自动居中
// imageAddText('./test.jpg', 'My name is Siam,中文名是宣言');
// 声明x y值
// imageAddText('./test.jpg', 'My name is Siam,中文名是宣言',200);
// imageAddText('./test.jpg', 'My name is Siam,中文名是宣言','auto', '300');
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