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2015
08-06

33个超级有用必须要收藏的PHP代码样例

    作为一个正常的程序员,会好几种语言是十分正常的,相信大部分程序员也都会编写几句PHP程序,如果是WEB程序员,PHP一定是必备的,即使你没用它开发过大型软件项目,也一定多少了解它的语法。

    在PHP的流行普及中,网上总结出了很多实用的PHP代码片段,这些代码片段在当你遇到类似的问题时,粘贴过去就可以使用,非常的高效,非常的省时省力。将这些程序员前辈总结出的优秀代码放到自己的知识库中,是一个善于学习的程序员的好习惯。

10个超级有用、必须收藏的PHP代码样例

PHP代码样例

<?php

/**
 * 时间:2015-8-6
 * 作者:River
 * 超级有用、必须收藏的PHP代码样例
 */
class Helper {

	/**
	 * 友好显示var_dump
	 */
	static public function dump($var, $echo = true, $label = null, $strict = true) {
		$label = ( $label === null ) ? '' : rtrim($label) . ' ';
		if (!$strict) {
			if (ini_get('html_errors')) {
				$output = print_r($var, true);
				$output = "<pre>" . $label . htmlspecialchars($output, ENT_QUOTES) . "</pre>";
			} else {
				$output = $label . print_r($var, true);
			}
		} else {
			ob_start();
			var_dump($var);
			$output = ob_get_clean();
			if (!extension_loaded('xdebug')) {
				$output = preg_replace("/\]\=\>\n(\s+)/m", "] => ", $output);
				$output = '<pre>' . $label . htmlspecialchars($output, ENT_QUOTES) . '</pre>';
			}
		}
		if ($echo) {
			echo $output;
			return null;
		} else
			return $output;
	}

	/**
	 * 获取客户端IP地址
	 */
	static public function getClientIP() {
		static $ip = NULL;
		if ($ip !== NULL)
			return $ip;
		if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
			$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
			$pos = array_search('unknown', $arr);
			if (false !== $pos)
				unset($arr[$pos]);
			$ip = trim($arr[0]);
		} elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
			$ip = $_SERVER['HTTP_CLIENT_IP'];
		} elseif (isset($_SERVER['REMOTE_ADDR'])) {
			$ip = $_SERVER['REMOTE_ADDR'];
		}
		// IP地址合法验证
		$ip = ( false !== ip2long($ip) ) ? $ip : '0.0.0.0';
		return $ip;
	}

	/**
	 * 循环创建目录
	 */
	static public function mkdir($dir, $mode = 0777) {
		if (is_dir($dir) || @mkdir($dir, $mode))
			return true;
		if (!mk_dir(dirname($dir), $mode))
			return false;
		return @mkdir($dir, $mode);
	}

	/**
	 * 格式化单位
	 */
	static public function byteFormat($size, $dec = 2) {
		$a = array("B", "KB", "MB", "GB", "TB", "PB");
		$pos = 0;
		while ($size >= 1024) {
			$size /= 1024;
			$pos++;
		}
		return round($size, $dec) . " " . $a[$pos];
	}

	/**
	 * 下拉框,单选按钮 自动选择
	 *
	 * @param $string 输入字符
	 * @param $param  条件
	 * @param $type   类型
	 *            selected checked
	 * @return string
	 */
	static public function selected($string, $param = 1, $type = 'select') {

		if (is_array($param)) {
			$true = in_array($string, $param);
		} elseif ($string == $param) {
			$true = true;
		}
		if ($true)
			$return = $type == 'select' ? 'selected="selected"' : 'checked="checked"';

		echo $return;
	}

	/**
	 * 获得来源类型 post get
	 *
	 * @return unknown
	 */
	static public function method() {
		return strtoupper(isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : 'GET' );
	}

	/**
	 * 提示信息
	 */
	static public function message($action = 'success', $content = '', $redirect = 'javascript:history.back(-1);', $timeout = 4) {

		switch ($action) {
			case 'success':
				$titler = '操作完成';
				$class = 'message_success';
				$images = 'message_success.png';
				break;
			case 'error':
				$titler = '操作未完成';
				$class = 'message_error';
				$images = 'message_error.png';
				break;
			case 'errorBack':
				$titler = '操作未完成';
				$class = 'message_error';
				$images = 'message_error.png';
				break;
			case 'redirect':
				header("Location:$redirect");
				break;
			case 'script':
				if (empty($redirect)) {
					exit('<script language="javascript">alert("' . $content . '");window.history.back(-1)</script>');
				} else {
					exit('<script language="javascript">alert("' . $content . '");window.location=" ' . $redirect . '   "</script>');
				}
				break;
		}

		// 信息头部
		$header = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>操作提示</title>
<style type="text/css">
body{font:12px/1.7 "\5b8b\4f53",Tahoma;}
html,body,div,p,a,h3{margin:0;padding:0;}
.tips_wrap{ background:#F7FBFE;border:1px solid #DEEDF6;width:780px;padding:50px;margin:50px auto 0;}
.tips_inner{zoom:1;}
.tips_inner:after{visibility:hidden;display:block;font-size:0;content:" ";clear:both;height:0;}
.tips_inner .tips_img{width:80px;float:left;}
.tips_info{float:left;line-height:35px;width:650px}
.tips_info h3{font-weight:bold;color:#1A90C1;font-size:16px;}
.tips_info p{font-size:14px;color:#999;}
.tips_info p.message_error{font-weight:bold;color:#F00;font-size:16px; line-height:22px}
.tips_info p.message_success{font-weight:bold;color:#1a90c1;font-size:16px; line-height:22px}
.tips_info p.return{font-size:12px}
.tips_info .time{color:#f00; font-size:14px; font-weight:bold}
.tips_info p a{color:#1A90C1;text-decoration:none;}
</style>
</head>

<body>';
		// 信息底部
		$footer = '</body></html>';

		$body = '<script type="text/javascript">
        function delayURL(url) {
        var delay = document.getElementById("time").innerHTML;
        //alert(delay);
        if(delay > 0){
        delay--;
        document.getElementById("time").innerHTML = delay;
    } else {
    window.location.href = url;
    }
    setTimeout("delayURL(\'" + url + "\')", 1000);
    }
    </script><div class="tips_wrap">
    <div class="tips_inner">
        <div class="tips_img">
            <img src="' . Yii::app()->baseUrl . '/static/images/' . $images . '"/>
        </div>
        <div class="tips_info">

            <p class="' . $class . '">' . $content . '</p>
            <p class="return">系统自动跳转在  <span class="time" id="time">' . $timeout . ' </span>  秒后,如果不想等待,<a href="' . $redirect . '">点击这里跳转</a></p>
        </div>
    </div>
</div><script type="text/javascript">
    delayURL("' . $redirect . '");
    </script>';

		exit($header . $body . $footer);
	}

	/**
	 * 查询字符生成
	 */
	static public function buildCondition(array $getArray, array $keys = array()) {
		if ($getArray) {
			foreach ($getArray as $key => $value) {
				if (in_array($key, $keys) && $value) {
					$arr[$key] = CHtml::encode(strip_tags($value));
				}
			}
			return $arr;
		}
	}

	/**
	 * base64_encode
	 */
	static function b64encode($string) {
		$data = base64_encode($string);
		$data = str_replace(array('+', '/', '='), array('-', '_', ''), $data);
		return $data;
	}

	/**
	 * base64_decode
	 */
	static function b64decode($string) {
		$data = str_replace(array('-', '_'), array('+', '/'), $string);
		$mod4 = strlen($data) % 4;
		if ($mod4) {
			$data .= substr('====', $mod4);
		}
		return base64_decode($data);
	}

	/**
	 * 验证邮箱
	 */
	public static function email($str) {
		if (empty($str))
			return true;
		$chars = "/^([a-z0-9+_]|\\-|\\.)+@(([a-z0-9_]|\\-)+\\.)+[a-z]{2,6}\$/i";
		if (strpos($str, '@') !== false && strpos($str, '.') !== false) {
			if (preg_match($chars, $str)) {
				return true;
			} else {
				return false;
			}
		} else {
			return false;
		}
	}

	/**
	 * 验证手机号码
	 */
	public static function mobile($str) {
		if (empty($str)) {
			return true;
		}

		return preg_match('#^13[\d]{9}$|14^[0-9]\d{8}|^15[0-9]\d{8}$|^18[0-9]\d{8}$#', $str);
	}

	/**
	 * 验证固定电话
	 */
	public static function tel($str) {
		if (empty($str)) {
			return true;
		}
		return preg_match('/^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$/', trim($str));
	}

	/**
	 * 验证qq号码
	 */
	public static function qq($str) {
		if (empty($str)) {
			return true;
		}

		return preg_match('/^[1-9]\d{4,12}$/', trim($str));
	}

	/**
	 * 验证邮政编码
	 */
	public static function zipCode($str) {
		if (empty($str)) {
			return true;
		}

		return preg_match('/^[1-9]\d{5}$/', trim($str));
	}

	/**
	 * 验证ip
	 */
	public static function ip($str) {
		if (empty($str))
			return true;

		if (!preg_match('#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $str)) {
			return false;
		}

		$ip_array = explode('.', $str);

		//真实的ip地址每个数字不能大于255(0-255)
		return ( $ip_array[0] <= 255 && $ip_array[1] <= 255 && $ip_array[2] <= 255 && $ip_array[3] <= 255 ) ? true : false;
	}

	/**
	 * 验证身份证(中国)
	 */
	public static function idCard($str) {
		$str = trim($str);
		if (empty($str))
			return true;

		if (preg_match("/^([0-9]{15}|[0-9]{17}[0-9a-z])$/i", $str))
			return true;
		else
			return false;
	}

	/**
	 * 验证网址
	 */
	public static function url($str) {
		if (empty($str))
			return true;

		return preg_match('#(http|https|ftp|ftps)://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)?#i', $str) ? true : false;
	}

	/**
	 * 根据ip获取地理位置
	 * @param $ip
	 * return :ip,beginip,endip,country,area
	 */
	public static function getlocation($ip = '') {
		$ip = new XIp();
		$ipArr = $ip->getlocation($ip);
		return $ipArr;
	}

	/**
	 * 中文转换为拼音
	 */
	public static function pinyin($str) {
		$ip = new XPinyin();
		return $ip->output($str);
	}

	/**
	 * 拆分sql
	 *
	 * @param $sql
	 */
	public static function splitsql($sql) {
		$sql = preg_replace("/TYPE=(InnoDB|MyISAM|MEMORY)( DEFAULT CHARSET=[^; ]+)?/", "ENGINE=\\1 DEFAULT CHARSET=" . Yii::app()->db->charset, $sql);
		$sql = str_replace("\r", "\n", $sql);
		$ret = array();
		$num = 0;
		$queriesarray = explode(";\n", trim($sql));
		unset($sql);
		foreach ($queriesarray as $query) {
			$ret[$num] = '';
			$queries = explode("\n", trim($query));
			$queries = array_filter($queries);
			foreach ($queries as $query) {
				$str1 = substr($query, 0, 1);
				if ($str1 != '#' && $str1 != '-')
					$ret[$num] .= $query;
			}
			$num++;
		}
		return ($ret);
	}

	/**
	 * 字符截取
	 *
	 * @param $string
	 * @param $length
	 * @param $dot
	 */
	public static function cutstr($string, $length, $dot = '...', $charset = 'utf-8') {
		if (strlen($string) <= $length)
			return $string;

		$pre = chr(1);
		$end = chr(1);
		$string = str_replace(array('&amp;', '&quot;', '&lt;', '&gt;'), array($pre . '&' . $end, $pre . '"' . $end, $pre . '<' . $end, $pre . '>' . $end), $string);

		$strcut = '';
		if (strtolower($charset) == 'utf-8') {

			$n = $tn = $noc = 0;
			while ($n < strlen($string)) {

				$t = ord($string[$n]);
				if ($t == 9 || $t == 10 || ( 32 <= $t && $t <= 126 )) {
					$tn = 1;
					$n++;
					$noc++;
				} elseif (194 <= $t && $t <= 223) {
					$tn = 2;
					$n += 2;
					$noc += 2;
				} elseif (224 <= $t && $t <= 239) {
					$tn = 3;
					$n += 3;
					$noc += 2;
				} elseif (240 <= $t && $t <= 247) {
					$tn = 4;
					$n += 4;
					$noc += 2;
				} elseif (248 <= $t && $t <= 251) {
					$tn = 5;
					$n += 5;
					$noc += 2;
				} elseif ($t == 252 || $t == 253) {
					$tn = 6;
					$n += 6;
					$noc += 2;
				} else {
					$n++;
				}

				if ($noc >= $length) {
					break;
				}
			}
			if ($noc > $length) {
				$n -= $tn;
			}

			$strcut = substr($string, 0, $n);
		} else {
			for ($i = 0; $i < $length; $i++) {
				$strcut .= ord($string[$i]) > 127 ? $string[$i] . $string[++$i] : $string[$i];
			}
		}

		$strcut = str_replace(array($pre . '&' . $end, $pre . '"' . $end, $pre . '<' . $end, $pre . '>' . $end), array('&amp;', '&quot;', '&lt;', '&gt;'), $strcut);

		$pos = strrpos($strcut, chr(1));
		if ($pos !== false) {
			$strcut = substr($strcut, 0, $pos);
		}
		return $strcut . $dot;
	}

	/**
	 * 描述格式化
	 * @param  $subject
	 */
	public static function clearCutstr($subject, $length = 0, $dot = '...', $charset = 'utf-8') {
		if ($length) {
			return XUtils::cutstr(strip_tags(str_replace(array("\r\n"), '', $subject)), $length, $dot, $charset);
		} else {
			return strip_tags(str_replace(array("\r\n"), '', $subject));
		}
	}

	/**
	 * 检测是否为英文或英文数字的组合
	 *
	 * @return unknown
	 */
	public static function isEnglist($param) {
		if (!eregi("^[A-Z0-9]{1,26}$", $param)) {
			return false;
		} else {
			return true;
		}
	}

	/**
	 * 将自动判断网址是否加http://
	 *
	 * @param $http
	 * @return  string
	 */
	public static function convertHttp($url) {
		if ($url == 'http://' || $url == '')
			return '';

		if (substr($url, 0, 7) != 'http://' && substr($url, 0, 8) != 'https://')
			$str = 'http://' . $url;
		else
			$str = $url;
		return $str;
	}

	/*
	  标题样式格式化
	 */

	public static function titleStyle($style) {
		$text = '';
		if ($style['bold'] == 'Y') {
			$text .='font-weight:bold;';
			$serialize['bold'] = 'Y';
		}

		if ($style['underline'] == 'Y') {
			$text .='text-decoration:underline;';
			$serialize['underline'] = 'Y';
		}

		if (!empty($style['color'])) {
			$text .='color:#' . $style['color'] . ';';
			$serialize['color'] = $style['color'];
		}

		return array('text' => $text, 'serialize' => empty($serialize) ? '' : serialize($serialize));
	}

	// 自动转换字符集 支持数组转换
	static public function autoCharset($string, $from = 'gbk', $to = 'utf-8') {
		$from = strtoupper($from) == 'UTF8' ? 'utf-8' : $from;
		$to = strtoupper($to) == 'UTF8' ? 'utf-8' : $to;
		if (strtoupper($from) === strtoupper($to) || empty($string) || (is_scalar($string) && !is_string($string))) {
			//如果编码相同或者非字符串标量则不转换
			return $string;
		}
		if (is_string($string)) {
			if (function_exists('mb_convert_encoding')) {
				return mb_convert_encoding($string, $to, $from);
			} elseif (function_exists('iconv')) {
				return iconv($from, $to, $string);
			} else {
				return $string;
			}
		} elseif (is_array($string)) {
			foreach ($string as $key => $val) {
				$_key = self::autoCharset($key, $from, $to);
				$string[$_key] = self::autoCharset($val, $from, $to);
				if ($key != $_key)
					unset($string[$key]);
			}
			return $string;
		} else {
			return $string;
		}
	}

	/*
	  标题样式恢复
	 */

	public static function titleStyleRestore($serialize, $scope = 'bold') {
		$unserialize = unserialize($serialize);
		if ($unserialize['bold'] == 'Y' && $scope == 'bold')
			return 'Y';
		if ($unserialize['underline'] == 'Y' && $scope == 'underline')
			return 'Y';
		if ($unserialize['color'] && $scope == 'color')
			return $unserialize['color'];
	}

	/**
	 * 列出文件夹列表
	 *
	 * @param $dirname
	 * @return unknown
	 */
	public static function getDir($dirname) {
		$files = array();
		if (is_dir($dirname)) {
			$fileHander = opendir($dirname);
			while (( $file = readdir($fileHander) ) !== false) {
				$filepath = $dirname . '/' . $file;
				if (strcmp($file, '.') == 0 || strcmp($file, '..') == 0 || is_file($filepath)) {
					continue;
				}
				$files[] = self::autoCharset($file, 'GBK', 'UTF8');
			}
			closedir($fileHander);
		} else {
			$files = false;
		}
		return $files;
	}

	/**
	 * 列出文件列表
	 *
	 * @param $dirname
	 * @return unknown
	 */
	public static function getFile($dirname) {
		$files = array();
		if (is_dir($dirname)) {
			$fileHander = opendir($dirname);
			while (( $file = readdir($fileHander) ) !== false) {
				$filepath = $dirname . '/' . $file;

				if (strcmp($file, '.') == 0 || strcmp($file, '..') == 0 || is_dir($filepath)) {
					continue;
				}
				$files[] = self::autoCharset($file, 'GBK', 'UTF8');
				;
			}
			closedir($fileHander);
		} else {
			$files = false;
		}
		return $files;
	}

	/**
	 * [格式化图片列表数据]
	 *
	 * @return [type] [description]
	 */
	public static function imageListSerialize($data) {

		foreach ((array) $data['file'] as $key => $row) {
			if ($row) {
				$var[$key]['fileId'] = $data['fileId'][$key];
				$var[$key]['file'] = $row;
			}
		}
		return array('data' => $var, 'dataSerialize' => empty($var) ? '' : serialize($var));
	}

	/**
	 * 反引用一个引用字符串
	 * @param  $string
	 * @return string
	 */
	static function stripslashes($string) {
		if (is_array($string)) {
			foreach ($string as $key => $val) {
				$string[$key] = self::stripslashes($val);
			}
		} else {
			$string = stripslashes($string);
		}
		return $string;
	}

	/**
	 * 引用字符串
	 * @param  $string
	 * @param  $force
	 * @return string
	 */
	static function addslashes($string, $force = 1) {
		if (is_array($string)) {
			foreach ($string as $key => $val) {
				$string[$key] = self::addslashes($val, $force);
			}
		} else {
			$string = addslashes($string);
		}
		return $string;
	}

	/**
	 * 格式化内容
	 */
	static function formatHtml($content, $options = '') {
		$purifier = new CHtmlPurifier();
		if ($options != false)
			$purifier->options = $options;
		return $purifier->purify($content);
	}

}

?>



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