为啥我的报错呢？
wuyongming
2017-09-22 20:49
<?php
Class Captcha{
//字体文件
private $_fontfile ='';
//画布宽度和高度
private $_width =120;
private $_height =40;
//字体大小
private $_size =20;
//验证吗长度
private $_length =4;
//画布资源
private $_image =null;
//干扰元素
//雪花*个数
private $_snow =0;
//像素个数
private $_pixel =0;
//线段个数
private $_line =0;
/**
* 初始化数据
* @param array $config
*/
public function _construct($config=array()){
if(is_array($config)&&count($config)>0){
//检测字体是否存在并且可读
if (isset($config['fontfile'])&&is_file('fontfile')&&is_readable('fontfile')) {
$this->_fontfile = $config['fontfile'];
}else{
return false;
}
//检测是否设置画布宽和高
if (isset($config['width'])&&$config['width']>0) {
$this->_width = (int)$config['width'];
}
if (isset($config['height'])&&$config['height']>0) {
$this->_height = (int)$config['height'];
}
if (isset($config['size'])&&$config['size']>0) {
$this->_size = (int)$config['size'];
}
//检测是否设置验证码长度
if (isset($config['length'])&&$config['length']>0) {
$this->_length = (int)$config['length'];
}
$this->_image = imagecreatetruecolor($this->_width, $this->_height);
return $this->_image;
//配置干扰元素
if (isset($config['snow'])&&$config['snow']>0) {
$this->_snow = (int)$config['snow'];
}
if (isset($config['pixel'])&&$config['pixel']>0) {
$this->_pixel = (int)$config['pixel'];
}
if (isset($config['line'])&&$config['line']>0) {
$this->_line = (int)$config['line'];
}
}else{
return false;
}
}
/**
* 得到验证码
* @return [type] [description]
*/
public function getCaptcha(){
$white = imagecolorallocate($this->_image, 255,255,255);
//填充矩形
imagefilledrectangle($this->_image, 0, 0, $this->_width, $this->_height,$white);
//生成验证码
$str = $this->_generateStr($this->_length);
if (false===$str) {
return false;
}
//绘制验证码
for ($i=0; $i < $this->_length; $i++) {
$size = $this->_size;
$angle = mt_rand(-30,30);
$x = ceil($this->_width/$this->_length)*$i+mt_rand(5,10);
$y = ceil($this->_height/1.5);
$color = $this->_getRandColor();
//中文$text = mb_substr($str,$i,1,'utf-8');
$text = $str($i);
$fontfile = $this->_fontfile;
imagettftext($this->_image, $size, $angle, $x, $y, $color, $fontfile, $text);
}
//雪花，像素和线段
if ($this->_snow) {
//使用雪花当作干扰元素
$this->_getSnow();
}else{
if ($this->_pixel) {
$this->_getPixel();
}
if ($this->_line) {
$this->_getLine();
}
}
//输出图像
header("Content-type:image/png");
imagepng($this->_image);
imagedestroy($this->_image);
return strtolower($str);
}
/**
* 产生雪花
* @return [type] [description]
*/
private function _getSnow(){
for ($i=1; $i <=$this->_snow ; $i++) {
imagestring($this->_image, mt_rand(1,5), mt_rand(0,$this->_width), mt_rand(0,$this->_height), '*', $this->_getRandColor());
}
}
/**
* 绘制像素
* @return [type] [description]
*/
private function _getPixel(){
for ($i=1; $i < $this->_pixel; $i++) {
imagesetpixel($this->_image, mt_rand(0,$this->_width), mt_rand(0,$this->_height), $this->_getRandColor());
}
}
/**
* 绘制线段
* @return [type] [description]
*/
private function _getLine(){
for ($i=1; $i < $this->_line; $i++) {
imageline($this->_image, mt_rand(0,$this->_width), mt_rand(0,$this->_height), mt_rand(0,$this->_width), mt_rand(0,$this->_height), $this->_getRandColor());
}
}
/**
* 产生验证码字符
* @param integer $length 验证码长度
* @return string 随机字符
*/
private function _generateStr($length=4){
if ($length<1 || $length>30) {
return false;
}
$chars = array('a','b','c','d','e','f','g','h','k','m','n','p','x','y','z','A','B','C','D','E','F','G','H','K','M','N','P','X','Y','Z',1,2,3,4,5,6,7,8,9);
$str = join('',array_rand(array_flip($chars),$length));
return $str;
}
private function _getRandColor(){
return imagecolorallocate($this->_image,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
}
}
?>
4回答
-
- 慕码人1187127
- 2019-01-05 14:27:57
哥们，构造函数construct前面是两个下划线，这是个大坑！
-
- qq_扶摇_2
- 2018-04-28 17:01:08
你这个应该是new实例化的时候，传进去的参数需要是一个数组，包含fontfile这个元素的数组（你这个报错不是资源，是因为构造里面，在检测字体文件那一步没有通过，没有进去到里面创建画布所致）
-
- 白小纯King
- 2017-10-24 12:54:04
<?php Class Captcha { // 字体文件 private $_fontFile=""; // 字体大小 private $_size=20; // 画布宽度 private $_width=120; // 画布高度 private $_height=40; // 验证码长度 private $_length=5; // 画布资源 private $_image=null; private $_snow=0; private $_pixel=0; private $_line=0; public function __construct($config=array()){ if(is_array($config) && count($config)>0){ if(isset($config['fontFile']) && is_file($config['fontFile'])&& is_readable($config['fontFile'])){ $this->_fontFile=$config['fontFile']; } // 检测是否设置字体大小 if(isset($config['size']) && $config['size']>0){ $this->_size=(int)$config['size']; } // 检测是否设置宽和高 if(isset($config['width']) && $config['width']>0){ $this->_width=(int)$config['width']; } if(isset($config['height']) && $config['height']>0){ $this->_height=(int)$config['height']; } // 检测是否设置验证码长度 if(isset($config['length']) && $config['length']>0){ $this->_length=(int)$config['length']; } // 配置干扰元素 if(isset($config['snow']) && $config['snow']>0){ $this->_snow=(int)$config['snow']; } if(isset($config['pixel']) && $config['pixel']>0){ $this->_pixel=(int)$config['pixel']; } if(isset($config['line']) && $config['line']>0){ $this->_line=(int)$config['line']; } $this->_image=imagecreatetruecolor($this->_width, $this->_height); return $this->_image; } } public function getCaptcha(){ $bgRandCol=imagecolorallocate($this->_image, mt_rand(200,255), mt_rand(200,255), mt_rand(200,255)); imagefilledrectangle($this->_image, 0, 0, $this->_width, $this->_height, $bgRandCol); $str=$this->_generateStr($this->_length); if(false===$str){ return false; } $fontFile=$this->_fontFile; for ($i=1;$i<$this->_length;$i++){ $size=$this->_size; $angle=mt_rand(-30, 30); $x=ceil($this->_width/$this->_length)*$i+mt_rand(5,10); $y=ceil($this->_height/1.5); $text=$str[$i]; imagettftext($this->_image, $size, $angle, $x, $y, $this->getRandCol(), $fontFile, $text); } if($this->_snow>0){ $this->_getSnow(); }else{ if($this->_pixel>0){ $this->_getPixel(); } if($this->_line>0){ $this->getLine(); } } header('Content-type:image/png'); imagepng($this->_image); imagedestroy($this->_image); } private function _getSnow(){ for($i=1;$i<=$this->_snow;$i++){ imagestring($this->_image, mt_rand(1,5), mt_rand(0, $this->_width), mt_rand(0, $this->_height), '*', $this->getRandCol()); } } private function _getPixel(){ for($i=1;$i<=$this->_pixel;$i++){ imagesetpixel($this->_image, mt_rand(0, $this->_width), mt_rand(0, $this->_height), $this->getRandCol()); } } private function getLine(){ for($i=1;$i<=$this->_line;$i++){ imageline($this->_image,mt_rand(0, $this->_width), mt_rand(0, $this->_height),mt_rand(0, $this->_width), mt_rand(0, $this->_height),$this->getRandCol()); } } private function getRandCol(){ return imagecolorallocate($this->_image, mt_rand(10, 100), mt_rand(10, 100), mt_rand(10, 100)); } private function _generateStr($length=4){ if($length<1 || $length>30){ return false; } $chars=array( 'a','b','c','d','e','f','g','h','k','m','n','p','x','y','z','A','B','C','D','E','F','G','H','K','M','N','P','X','Y','Z', 2,3,4,5,6,7,8,9 ); $str=join('',array_rand(array_flip($chars),$length)); return $str; } }我这边更改了一些，$_length有个问题，设置的时候要多加一个，要不然设置为4，显示只有3个str
-
- TendeRess
- 2017-10-08 18:34:12
//看一下我写的，你的里面有好多小错误点，我就不一一列举了 <?php class Captcha{ //字体文件 private $_fontfile = ''; //画布宽度 private $_width = 120; //画布宽度 private $_height = 40; //字体大小 private $_size = 20; //验证码长度 private $_length = 4; //画布资源 public $_image = null; //干扰元素,雪花数量 private $_snow = 0; private $_pixel = 0; private $_line = 0; /** * [初始化数据] * @param array $config */ public function __construct($config=array()){ if(is_array($config)&&count($config)>0){ //检测字体文件是否存在并且可读 if(isset($config['fontfile'])&&is_file($config['fontfile'])&&is_readable($config['fontfile'])){ $this->_fontfile = $config['fontfile']; //检测是否设置画布宽和高 if(isset($config['width'])&&$config['width']>0){ $this->_width = (int)$config['width']; } if(isset($config['height'])&&$config['height']>0){ $this->_height = (int)$config['height']; } //检测是否设置字体大小 if(isset($config['size'])&&$config['size']>0){ $this->_size = (int)$config['size']; } //检测是否设置验证码 if(isset($config['length'])&&$config['length']>0){ $this->_length = (int)$config['length']; } //检干扰元素 if(isset($config['snow'])&&$config['snow']>0){ $this->_snow = (int)$config['snow']; } if(isset($config['pixel'])&&$config['pixel']>0){ $this->_pixel = (int)$config['pixel']; } if(isset($config['line'])&&$config['line']>0){ $this->_line = (int)$config['line']; } $this->_image = imagecreatetruecolor($this->_width, $this->_height); return $this->_image; } else{ return false; } } else{ return false; } } private function _getRandColor(){ return imagecolorallocate($this->_image,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255)); } /** * 得到验证码 * @return [type] [description] */ public function getCaptcha(){ $white = imagecolorallocate($this->_image,255,255,255); //填充矩形 imagefilledrectangle($this->_image, 0, 0, $this->_width, $this->_height, $white); //生成验证码 $str = $this->_generateStr($this->_length); if(false===$str) return false; $fontfile = $this->_fontfile; //绘制 for($i=0;$i<$this->_length;$i++){ $size = $this->_size; $angle = mt_rand(-30,30); $x = ceil($this->_width/$this->_length)*$i+mt_rand(5,10); $y = ceil($this->_height/1.5); $color = $this->_getRandColor(); //$this->不要忘啦写 // $text = mb_substr($str,$i,i,'utf-8'); $text = $str{$i}; //这里是大括号！！！掉坑里了 imagettftext($this->_image, $size, $angle, $x, $y, $color, $fontfile ,$text); } //干扰元素 if($this->_snow){ $this->_getSnow(); }else{ if($this->_pixel){ $this->_getPixel(); } if($this->_line){ $this->_getLine(); } } //输出图像 header('content-type:image/png'); imagepng($this->_image); imagedestroy($this->_image); return strtolower($str); } /** * 产生雪花干扰元素 * @return [type] [description] */ private function _getSnow(){ for($i=1;$i<=$this->_snow;$i++){ imagestring($this->_image, mt_rand(1,5), mt_rand(0,$this->_width),mt_rand(0,$this->_height),'*',$this->_getRandColor());//第二个参数是字体大小在1-5 } } /** * 绘制像素 * @return [type] [description] */ private function _getPixel(){ for($i=1;$i<=$this->_pixel;$i++){ imagesetpixel($this->_image, mt_rand(0,$this->_width),mt_rand(0,$this->_height),$this->_getRandColor()); } } /** * 绘制线段 * @return [type] [description] */ private function _getLine(){ for($i=1;$i<=$this->_line;$i++){ imageline($this->_image, mt_rand(0,$this->_width),mt_rand(0,$this->_height),mt_rand(0,$this->_width),mt_rand(0,$this->_height), $this->_getRandColor()); } } /** * 产生验证码字符 * @param integer $length [验证码长度] * @return 随机字符 string */ private function _generateStr($length=4){ if($length<1 || $length>30){ return false; } $chars = array('a','b','c','d','e','f','g','h','i','j','k','m','n','p','x','y','z','A','B','C','D','E','F','G','H','I','J','K','M','N','P','X','Y','Z',1,2,3,4,5,6,7,8,9); $str = join('',array_rand(array_flip($chars),$length)); return $str; } } ?>
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