这篇文章主要为大家详细介绍了php 限定区域自动调整字体大小的类,具有一定的参考价值,可以用来参考一下。
对php在限定的区域里自动调整字体大小的php类 imagefittext.class.php感兴趣的小伙伴,下面一起跟随四海网的小编两巴掌来看看吧!
<?php
/**
* php在限定的区域里自动调整字体大小的php类 imagefittext.class.php
*
* @param
* @author 四海网 www.q1010.com
**/
// 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 = $wraplength<($min_wraplength+$this->step_wrap)?($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];
}
}
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关键词:字体大小
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