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。

PHP代码样例

/**

* 时间：2015-8-6

* 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 = "

} 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 = '

}

}

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('');

} else {

exit('');

}

break;

}

// 信息头部

$header = '

// 信息底部

$footer = '';

$body = '

' . $content . '

系统自动跳转在 ' . $timeout . ' 秒后，如果不想等待，点击这里跳转

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);

}

}

?>

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