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。
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);
$string = str_replace(array(\'&\', \'"\', \'<\', \'>\'), array($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(\'&\', \'"\', \'<\', \'>\'), $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);
}
}
?>
