PHP IMG2TXT

<?php/*2015年10月19日10:24:59by zxlong*/// 打开一幅图像$file_name='d:\ascii_dora.png';$chars = "$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ";function getimgchars($color_tran,$chars){    $length = strlen($chars);    $alpha=$color_tran['alpha'];    $r=$color_tran['red'];    $g=$color_tran['green'];    $b=$color_tran['blue'];    $gray = intval(0.2126 * $r + 0.7152 * $g + 0.0722 * $b);        if($gray==0){       return '.'; }       if($gray<196){        $unit = (256.0 + 1)/$length;       return $chars[intval($gray/$unit)]; }      return " ";}function color_img($color_tran,$chars){  $length = strlen($chars);    $alpha=$color_tran['alpha'];       $r=$color_tran['red'];    $g=$color_tran['green'];    $b=$color_tran['blue'];   $gray = intval(0.2126 * $r + 0.7152 * $g + 0.0722 * $b);    $rand=rand (0,  $length-1); $color="rgb(".$r.",".$g.",".$b.")"; $char=$chars[$rand];   return '<span style="color:'.$color.'" >'.$char."</span>";;  }function resize_img($file_name,$chars,$flage=true){    //header('Content-Type: image/jpeg');   list($width, $height,$type) = getimagesize($file_name); $fun='imagecreatefrom' . image_type_to_extension($type, false); if($type==3){       $flage=false;   }   $fun($file_name);   $new_height =100;   $percent=$height/$new_height;   $new_width=$width/$percent; $image_p = imagecreatetruecolor($new_width, $new_height);   $image = $fun($file_name);  imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); if($flage){     return $image_p;    }else{      return $image;  }   }$im=resize_img($file_name,$chars);$width=imagesx($im);$height=imagesy($im);$back_text="";for($i=1;$i<=$height;$i++){    for($j=1;$j<=$width;$j++){        $color_index = imagecolorat($im, $j-1, $i-1);        $color_tran = imagecolorsforindex($im, $color_index);        $back_text.=color_img($color_tran,$chars,false);    }    $back_text.="<br/>";}echo "<pre class="brush:php;toolbar:false">";echo $back_text;echo "

";//file_put_contents('1.txt',$back_text);