规定区域内字体大小自适应php代码

代码1 :

<?php // 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){   $t = p_w_picpathttfbbox($this->fontsize, 0, $this->font, $text);   return $t[2]-$t[0];  }  function TextHeight($text){   $t = p_w_picpathttfbbox($this->fontsize, 0, $this->font, $text);   return $t[1]-$t[7];  } } ?> 

代码2:

<?php // Image Fit Text Class 0.1 by ming0070913 // Example File include "p_w_picpathfittext.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 p_w_picpath $im = @p_w_picpathcreatetruecolor($width+$x1*2, $height+$y1*2+80) or die('Cannot Initialize new GD p_w_picpath stream'); // Start the timer $time_start = microtime_float(); 

//The class $p_w_picpathfittext = new ImageFitText($font, $step_wrap, $step_fontsize); // Fit the text // It returns the result in a array with "fontsize", "text", "width", "height" $fit = $p_w_picpathfittext->fit($width-$padding*2, $height-$padding*2, $text, $fontsize, $min_fontsize, $min_wraplength); // Stop the timer $time = round(microtime_float()-$time_start, 3); $white = p_w_picpathcolorallocate($im, 255, 255, 255); // Draw a box p_w_picpathrectangle($im, $x1, $y1, $x1+$width, $y1+$height, $white); // Write the text            +8 because the text will move up originally p_w_picpathttftext($im, $fit['fontsize'], 0, $x1+$padding, $y1+$padding+8, $white, $font, $fit['text']); // Print some info. about the text p_w_picpathstring($im, 5, $x1, $y1+$height+30, 'Fontsize : '.$fit['fontsize'], $white); p_w_picpathstring($im, 5, $x1, $y1+$height+45, 'Text Size : '.$fit['width']."x".$fit['height'], $white); p_w_picpathstring($im, 5, $x1, $y1+$height+60, 'Box Size : '.($width-$padding*2)."x".($height-$padding*2), $white); p_w_picpathstring($im, 5, $x1, $y1+$height+75, 'Time used : '.$time.'s', $white); // Print the p_w_picpath header ('Content-Type: p_w_picpath/png'); p_w_picpathpng($im); p_w_picpathdestroy($im); function microtime_float(){ // Timer  list($usec, $sec) = explode(" ", microtime());  return ((float)$usec + (float)$sec); } ?>