php图片操作

来源：互联网发布：ketshot 5 mac版破解编辑：程序博客网时间：2024/05/22 05:27

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">源于猪八戒网上的一次招标，前前后后，学到了不少东西。自己简单整理下。</span>

在图片上写文字

function Xiezi($tt,$width,$height){$image = ImageCreateFromJPEG( "test.jpg" );$cor = imagecolorallocate($image, 0, 0, 0);$font = 'xihei.ttf';//$tt = '我们的灵魂';//imagepsslantfont($font, 22.5);$a = im($image, 12, 0, $width, $height, $cor, $font, $tt,3);//header('Content-type: image/jpeg');imagejpeg($image,"test.jpg");}function im(&$image, $size, $angle, $start_x, $y, $color, $font, $text,$spancing) { for ($i=0;$i<mb_strlen($text,'utf8');$i++) {    $t = mb_substr($text, $i,1,'utf8');    $x = $i*($size+$spancing);    imagettftext($image, $size, $angle, $x+$start_x, $y, $color, $font, $t);    }   }

图片的缩放操作

//图片缩放function thumb($filename,$width=200,$height=200){list($width_org,$height_org)=getimagesize($filename);/*if($width && ($width_org < $height_org)){$width=($height/$height_org)*$width_org;}else{$height=($width/$width_org)*$height_org;}*///如果上面代码没被注释 那么是等比例缩放$image_p=imagecreatetruecolor($width, $height);$image=imagecreatefromjpeg($filename);imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_org, $height_org);imagejpeg($image_p,$filename,100);imagedestroy($image_p);imagedestroy($image);}

加水印函数

//加水印的函数function watermark($filename,$water){list($b_w,$b_h)=getimagesize($filename);list($w_w,$w_h)=getimagesize($water);$posX=rand(0,($b_w-$w_w));$posY=rand(0,($b_h-$b_h));$back=imagecreatefromjpeg($filename);$water=imagecreatefromjpeg($water);imagecopy($back, $water, 519, 111, 0, 0, $w_w, $w_h);imagejpeg($back,"test.jpg");imagedestroy($back);imagedestroy($water);}

生成随机字符串

//生成随机字符串function getRandChar($length){   $str = null;   $strPol = "0123456789";   $max = strlen($strPol)-1;   for($i=0;$i<$length;$i++){    $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数   }   return $str;}

字符串逐字拆分函数

function arr_split_zh($tempaddtext){   $tempaddtext = iconv("UTF-8", "gb2312", $tempaddtext);    $cind = 0;    $arr_cont=array();    for($i=0;$i<strlen($tempaddtext);$i++)    {        if(strlen(substr($tempaddtext,$cind,1)) > 0){        if(ord(substr($tempaddtext,$cind,1)) < 0xA1 ){ //如果为英文则取1个字节                array_push($arr_cont,substr($tempaddtext,$cind,1));                $cind++;            }else{                array_push($arr_cont,substr($tempaddtext,$cind,2));                $cind+=2;            }        }    }   foreach ($arr_cont as &$row)   {   $row=iconv("gb2312","UTF-8",$row);   }return $arr_cont;}

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