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 "