<?php
class textPNG
{
private $font; // 默认字体. 相对于脚本存放目录的相对路径.
private $msg; // 默认文字.
private $width = ""; // 默认宽度.
private $size;
private $rot = 0; // 旋转角度.
private $pad = 10; // 填充.
private $transparent = true; // 文字透明度.
private $red = 255; // 在黑色背景中...
private $grn = 255;
private $blu = 255;
private $bg_red = 255; // 将文字设置为白色.
private $bg_grn = 255;
private $bg_blu = 255;
public function __construct($paras = array())
{
empty($paras) && $paras = $_GET;
isset($paras['text']) && $this->msg = $paras['text'];
isset($paras['font']) && $this->font = $paras['font'];
isset($paras['fontsize']) && $this->size = $paras['fontsize'];
isset($paras['rot']) && $this->rot = $paras['rot'];
isset($paras['pad']) && $this->pad = $paras['pad'];
isset($paras['transparent']) && $this->transparent = $paras['transparent'];
if (isset($paras['color']) && !empty($paras['color'])) {
$this_color_hex = $this->HexToRGB($paras['color']);
$this->red = $this_color_hex['red']; // 文字颜色
$this->grn = $this_color_hex['green'];
$this->blu = $this_color_hex['blue'];
} else {
isset($paras['red']) && $this->red = $paras['red'];
isset($paras['grn']) && $this->grn = $paras['grn'];
isset($paras['blu']) && $this->blu = $paras['blu'];
}
if (isset($paras['bg_color']) && !empty($paras['bg_color'])) {
$bg_color_hex = $this->HexToRGB($paras['bg_color']);
$this->bg_red = $bg_color_hex['red']; // 背景颜色.
$this->bg_grn = $bg_color_hex['green'];
$this->bg_blu = $bg_color_hex['blue'];
} else {
isset($paras['bg_red']) && $this->bg_red = $paras['bg_red'];
isset($paras['bg_grn']) && $this->bg_grn = $paras['bg_grn'];
isset($paras['bg_blu']) && $this->bg_blu = $paras['bg_blu'];
}
if (isset($paras['width']) && !empty($paras['width'])) {
$this->width = $paras['width'];
$this->msg = $this->autowrap($this->size, $this->font, $this->msg, $paras['width']);
} else {
$this->msg = $this->autowrap($this->size, $this->font, $this->msg);
}
}
public function draw( $savepic=null ) {
$width = 0;
$height = 0;
$offset_x = 0;
$offset_y = 0;
$bounds = array();
$image = "";
// 确定文字高度.
$bounds = ImageTTFBBox($this->size, $this->rot, $this->font, "W");
if ($this->rot < 0) {
$font_height = abs($bounds[7] - $bounds[1]);
} else if ($this->rot > 0) {
$font_height = abs($bounds[1] - $bounds[7]);
} else {
$font_height = abs($bounds[7] - $bounds[1]);
}
// 确定边框高度.
$bounds = ImageTTFBBox($this->size, $this->rot, $this->font, $this->msg);
if ($this->rot < 0) {
$width = abs($bounds[4] - $bounds[0]);
$height = abs($bounds[3] - $bounds[7]);
$offset_y = $font_height;
$offset_x = 0;
} else if ($this->rot > 0) {
$width = abs($bounds[2] - $bounds[6]);
$height = abs($bounds[1] - $bounds[5]);
$offset_y = abs($bounds[7] - $bounds[5]) + $font_height;
$offset_x = abs($bounds[0] - $bounds[6]);
} else {
$width = abs($bounds[4] - $bounds[6]);
$height = abs($bounds[7] - $bounds[1]);
$offset_y = $font_height;
$offset_x = 0;
}
if ($this->width) {
$image = imagecreate($this->width, $height + ($this->pad * 2) + 1);
} else {
$image = imagecreate($width + ($this->pad * 2) + 1, $height + ($this->pad * 2) + 1);
}
$background = ImageColorAllocate($image, $this->bg_red, $this->bg_grn, $this->bg_blu);
$foreground = ImageColorAllocate($image, $this->red, $this->grn, $this->blu);
if ($this->transparent) {
ImageColorTransparent($image, $background);
}
ImageInterlace($image, false);
// 画图.
ImageTTFText($image, $this->size, $this->rot, $offset_x + $this->pad, $offset_y + $this->pad, $foreground, $this->font, $this->msg);
// 输出为png格式.
Header("Content-type: image/png");
if( $savepic )
imagePNG($image, $savepic);
else
{
// 输出为png格式.
Header("Content-type: image/png");
imagePNG($image);
}
}
// 自动调整宽度（字体大小, 字体名称, 字符串, 预设宽度, 角度）
public function autowrap($fontsize, $fontface, $string, $width = "", $angle = 0) {
// 将字符串拆分成一个个单字 保存到数组 letter 中
for ($i = 0; $i < mb_strlen($string); $i++) {
$letter[] = mb_substr($string, $i, 1, 'utf-8');
}
$letter = array_filter($letter);
$content = "";
for ($i = 0; $i < count($letter); $i++) {
// 换行处理
if ($letter[$i] == "/" && $letter[$i + 1] == "n") {
$content .= "\n";
unset($letter[$i]);
unset($letter[$i + 1]);
continue;
}
if ($width) {
$teststr = $content . " " . $letter[$i];
$testbox = imagettfbbox($fontsize, $angle, $fontface, $teststr);
if (($testbox[2] > $width) && ($content !== "")) {
$content .= "\n";
}
}
$content .= $letter[$i];
}
return $content;
}
// Hex颜色转RGB颜色
public function HexToRGB($colour) {
if ($colour[0] == '#') {
$colour = substr($colour, 1);
}
if (strlen($colour) == 6) {
list($r, $g, $b) = array(
$colour[0] . $colour[1],
$colour[2] . $colour[3],
$colour[4] . $colour[5],
);
} elseif (strlen($colour) == 3) {
list($r, $g, $b) = array(
$colour[0] . $colour[0],
$colour[1] . $colour[1],
$colour[2] . $colour[2],
);
} else {
return false;
}
$r = hexdec($r);
$g = hexdec($g);
$b = hexdec($b);
return array(
'red' => $r,
'green' => $g,
'blue' => $b,
);
}
}
//配置文字
$paras = [
"font" => getcwd() . '/msyh.ttf',//字体位置
"text" => "商旅大酒店",//字符串,14个字最佳
"fontsize" => 80, //字体大小
"transparent" => true,//图片透明
"color" => "#FFFFFF",//字体颜色
"bg_color" => "#0E6EB8",//背景颜色
];
$png = new textPNG( $paras );
$savepng = "./tt.png";
$png->draw( $savepng );
?>
