php字体大小_php实现在限定区域里自动调整字体大小的类实例

﹏ヽ暗。殇╰゛Y 2022-11-12 04:13 173阅读 0赞

本文实例讲述了php实现在限定区域里自动调整字体大小的类。分享给大家供大家参考。具体如下：

这里的php类imagefittext.class.php实现在限定的区域里自动调整字体大小的功能。

// Image Fit Text Class 0.1 by ming0070913

CLASS ImageFitText\{

public $font, $fontsize, $width, $height;

public $step\_wrap, $step\_fontsize;

public function \_\_construct($font, $step\_wrap=1, $step\_fontsize=1)\{

$this->font = $font;

$this->step\_wrap = $step\_wrap>1?$step\_wrap:1;

$this->step\_fontsize = $step\_fontsize>1?$step\_fontsize:1;

function fit($width, $height, $text, $fontsize, $min\_fontsize=5, $min\_wraplength=0)\{

$this->fontsize = & $fontsize;

$text\_ = $text;

while($this->TextHeight($text\_)>$height && $fontsize>$min\_fontsize)

$fontsize -= $this->step\_fontsize;

while(($this->TextWidth($text\_)>$width || $this->TextHeight($text\_)>$height) && $fontsize>$min\_fontsize)\{

$fontsize -= $this->step\_fontsize;

$wraplength = $this->maxLen($text);

$text\_ = $text;

while($this->TextWidth($text\_)>$width && $wraplength>=$min\_wraplength+$this->step\_wrap)\{

$wraplength -= $this->step\_wrap;

$text\_ = wordwrap($text, $wraplength, "\\n", true);

//To speed up:

if($this->TextHeight($text\_)>$height) break;

if($wraplength<=$min\_wraplength) break;

$wraplength\_ = $wraplength;

$wraplength = ceil($wraplength/($this->TextWidth($text\_)/$width));

$wraplength = $wraplengthstep\_wrap)?($min\_wraplength+$this->step\_wrap):$wraplength;

$this->width = $this->TextWidth($text\_);

$this->height = $this->TextHeight($text\_);

return array("fontsize"=>$fontsize, "text"=>$text\_, "width"=>$this->width, "height"=>$this->height);

function maxLen($text)\{

$lines = explode("\\n", str\_replace("\\r", "", $text));

foreach($lines as $line)

$t\[\] = strlen($line);

return max($t);

function TextWidth($text)\{

$t = imagettfbbox($this->fontsize, 0, $this->font, $text);

return $t\[2\]-$t\[0\];

function TextHeight($text)\{

$t = imagettfbbox($this->fontsize, 0, $this->font, $text);

return $t\[1\]-$t\[7\];

使用范例如下：

// Image Fit Text Class 0.1 by ming0070913

// Example File

include "imagefittext.class.php";

// Settings :

// The text

$text = "PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual.";

// The maximun width

$width = 200;

// The maximun height

$height = 100;

// Position of the text and the box

$x1 = 50;

$y1 = 50;

// The starting font size

$fontsize = 10;

// The minimun font size. The script will stop if it cannot fit the text even with this size.

$min\_fontsize = 3;

// The minimun wrap length for each line. The script will try another font size if it cannot fit the text even with this wrap length.

$min\_wraplength = 0;

// The font

$font = "arial.ttf";

// The space between the box and the text. It's independent to the script which can be ignored

$padding = 3;

// If the script cannot fit the text for certain wrap length, it will try the wrap length again with the reduction in this value.

// It reduce the accuracy, but will slightly speed up the process.

$step\_wrap = 1;

// If the script cannot fit the text for certain font size, it will try the the font size again with the reduction in this value.

// It reduce the accuracy, but will slightly speed up the process.

$step\_fontsize = 1;

// Create a image

$im = @imagecreatetruecolor($width+$x1\*2, $height+$y1\*2+80) or die('Cannot Initialize new GD image stream');

// Start the timer

$time\_start = microtime\_float();

// The class

$imagefittext = new ImageFitText($font, $step\_wrap, $step\_fontsize);

// Fit the text

// It returns the result in a array with "fontsize", "text", "width", "height"

$fit = $imagefittext->fit($width-$padding\*2, $height-$padding\*2, $text, $fontsize, $min\_fontsize, $min\_wraplength);

// Stop the timer

$time = round(microtime\_float()-$time\_start, 3);

$white = imagecolorallocate($im, 255, 255, 255);

// Draw a box

imagerectangle($im, $x1, $y1, $x1+$width, $y1+$height, $white);

// Write the text +8 because the text will move up originally

imagettftext($im, $fit\['fontsize'\], 0, $x1+$padding, $y1+$padding+8, $white, $font, $fit\['text'\]);

// Print some info. about the text

imagestring($im, 5, $x1, $y1+$height+30, 'Fontsize : '.$fit\['fontsize'\], $white);

imagestring($im, 5, $x1, $y1+$height+45, 'Text Size : '.$fit\['width'\]."x".$fit\['height'\], $white);

imagestring($im, 5, $x1, $y1+$height+60, 'Box Size : '.($width-$padding\*2)."x".($height-$padding\*2), $white);

imagestring($im, 5, $x1, $y1+$height+75, 'Time used : '.$time.'s', $white);

// Print the image

header ('Content-Type: image/png');

imagepng($im);

imagedestroy($im);

function microtime\_float()\{ // Timer

list($usec, $sec) = explode(" ", microtime());

return ((float)$usec + (float)$sec);

希望本文所述对大家的php程序设计有所帮助。

php字体大小_php实现在限定区域里自动调整字体大小的类实例

发表评论取消回复

还没有评论，来说两句吧...

相关阅读

相关字体系列之字体大小(CSS、HTML)

相关 idea 2023.1设置：字体设置及自动调整大小

相关根据窗口的大小，自动改变字体大小，使用rem。

相关 jmeter5.1安装界面字体调整大小

相关 php字体大小_php实现在限定区域里自动调整字体大小的类实例

相关调整控件字体的大小

相关 Eclipse设置：背景与字体大小和xml文件中字体大小调整（转载）

相关 latex字体大小调整

相关 webstorm字体设置大小

相关浏览器字体大小的坑