php 常用函数收藏（一）

/** * 返回经addslashes处理过的字符串或数组 * @param $string 需要处理的字符串或数组 * @return mixed */function new_addslashes($string){if(!is_array($string)) return addslashes($string);foreach($string as $key => $val) $string[$key] = new_addslashes($val);return $string;}/** * 返回经stripslashes处理过的字符串或数组 * @param $string 需要处理的字符串或数组 * @return mixed */function new_stripslashes($string) {if(!is_array($string)) return stripslashes($string);foreach($string as $key => $val) $string[$key] = new_stripslashes($val);return $string;}/** * 返回经addslashe处理过的字符串或数组 * @param $obj 需要处理的字符串或数组 * @return mixed */function new_html_special_chars($string) {if(!is_array($string)) return htmlspecialchars($string);foreach($string as $key => $val) $string[$key] = new_html_special_chars($val);return $string;}/** * 安全过滤函数 * * @param $string * @return string */function safe_replace($string) {$string = str_replace('%20','',$string);$string = str_replace('%27','',$string);$string = str_replace('%2527','',$string);$string = str_replace('*','',$string);$string = str_replace('"','"',$string);$string = str_replace("'",'',$string);$string = str_replace('"','',$string);$string = str_replace(';','',$string);$string = str_replace('<','<',$string);$string = str_replace('>','>',$string);$string = str_replace("{",'',$string);$string = str_replace('}','',$string);return $string;}/** * 过滤ASCII码从0-28的控制字符 * @return String */function trim_unsafe_control_chars($str) {$rule = '/[' . chr ( 1 ) . '-' . chr ( 8 ) . chr ( 11 ) . '-' . chr ( 12 ) . chr ( 14 ) . '-' . chr ( 31 ) . ']*/';return str_replace ( chr ( 0 ), '', preg_replace ( $rule, '', $str ) );}/** * 格式化文本域内容 * * @param $string 文本域内容 * @return string */function trim_textarea($string) {$string = nl2br ( str_replace ( ' ', ' ', $string ) );return $string;}/** * 将文本格式成适合js输出的字符串 * @param string $string 需要处理的字符串 * @param intval $isjs 是否执行字符串格式化，默认为执行 * @return string 处理后的字符串 */function format_js($string, $isjs = 1){$string = addslashes(str_replace(array("\r", "\n"), array('', ''), $string));return $isjs ? 'document.write("'.$string.'");' : $string;}/** * 转义 javascript 代码标记 * * @param $str * @return mixed */function trim_script($str) {$str = preg_replace ( '/\<([\/]?)script([^\>]*?)\>/si', '<\\1script\\2>', $str );$str = preg_replace ( '/\<([\/]?)iframe([^\>]*?)\>/si', '<\\1iframe\\2>', $str );$str = preg_replace ( '/\<([\/]?)frame([^\>]*?)\>/si', '<\\1frame\\2>', $str );$str = preg_replace ( '/]]\>/si', ']] >', $str );return $str;}/** * 获取当前页面完整URL地址 */function get_url() {$sys_protocal = isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://';$php_self = $_SERVER['PHP_SELF'] ? safe_replace($_SERVER['PHP_SELF']) : safe_replace($_SERVER['SCRIPT_NAME']);$path_info = isset($_SERVER['PATH_INFO']) ? safe_replace($_SERVER['PATH_INFO']) : '';$relate_url = isset($_SERVER['REQUEST_URI']) ? safe_replace($_SERVER['REQUEST_URI']) : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.safe_replace($_SERVER['QUERY_STRING']) : $path_info);return $sys_protocal.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '').$relate_url;}/** * 字符截取 支持UTF8/GBK * @param $string * @param $length * @param $dot */function str_cut($string, $length, $dot = '...') {$strlen = strlen($string);if($strlen <= $length) return $string;$string = str_replace(array(' ',' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);$strcut = '';if(strtolower(CHARSET) == 'utf-8') {$length = intval($length-strlen($dot)-$length/3);$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, $n);$strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), $strcut);} else {$dotlen = strlen($dot);$maxi = $length - $dotlen - 1;$current_str = '';$search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵');$replace_arr = array('&',' ', '"', ''', '“', '”', '—', '<', '>', '·', '…',' ');$search_flip = array_flip($search_arr);for ($i = 0; $i < $maxi; $i++) {$current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];if (in_array($current_str, $search_arr)) {$key = $search_flip[$current_str];$current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);}$strcut .= $current_str;}}return $strcut.$dot;}/** * 获取请求ip * * @return ip地址 */function ip() {if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {$ip = getenv('HTTP_CLIENT_IP');} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {$ip = getenv('HTTP_X_FORWARDED_FOR');} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {$ip = getenv('REMOTE_ADDR');} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {$ip = $_SERVER['REMOTE_ADDR'];}return preg_match ( '/[\d\.]{7,15}/', $ip, $matches ) ? $matches [0] : '';}function get_cost_time() {$microtime = microtime ( TRUE );return $microtime - SYS_START_TIME;}/** * 程序执行时间 * * @returnint单位ms */function execute_time() {$stime = explode ( ' ', SYS_START_TIME );$etime = explode ( ' ', microtime () );return number_format ( ($etime [1] + $etime [0] - $stime [1] - $stime [0]), 6 );}/*** 产生随机字符串** @param    int        $length  输出长度 * @param    string     $chars   可选的 ，默认为 0123456789* @return   string     字符串*/function random($length, $chars = '0123456789') {$hash = '';$max = strlen($chars) - 1;for($i = 0; $i < $length; $i++) {$hash .= $chars[mt_rand(0, $max)];}return $hash;}/*** 将字符串转换为数组** @paramstring$data字符串* @returnarray返回数组格式，如果，data为空，则返回空数组*/function string2array($data) {if($data == '') return array();eval("\$array = $data;");return $array;}/*** 将数组转换为字符串** @paramarray$data数组* @parambool$isformdata如果为0，则不使用new_stripslashes处理，可选参数，默认为1* @returnstring返回字符串，如果，data为空，则返回空*/function array2string($data, $isformdata = 1) {if($data == '') return '';if($isformdata) $data = new_stripslashes($data);return addslashes(var_export($data, TRUE));}/*** 转换字节数为其他单位*** @paramstring$filesize字节大小* @returnstring返回大小*/function sizecount($filesize) {if ($filesize >= 1073741824) {$filesize = round($filesize / 1073741824 * 100) / 100 .' GB';} elseif ($filesize >= 1048576) {$filesize = round($filesize / 1048576 * 100) / 100 .' MB';} elseif($filesize >= 1024) {$filesize = round($filesize / 1024 * 100) / 100 . ' KB';} else {$filesize = $filesize.' Bytes';}return $filesize;}/*** 字符串加密、解密函数*** @paramstring$txt字符串* @paramstring$operationENCODE为加密，DECODE为解密，可选参数，默认为ENCODE，* @paramstring$key密钥：数字、字母、下划线* @returnstring*/function sys_auth($txt, $operation = 'ENCODE', $key = '') {$key= $key ? $key : pc_base::load_config('system', 'auth_key');$txt= $operation == 'ENCODE' ? (string)$txt : base64_decode($txt);$len= strlen($key);$code= '';for($i=0; $i<strlen($txt); $i++){$k= $i % $len;$code  .= $txt[$i] ^ $key[$k];}$code = $operation == 'DECODE' ? $code : base64_encode($code);return $code;}/*** 语言文件处理** @paramstring$language标示符* @paramarray$pars转义的数组,二维数组 ,'key1'=>'value1','key2'=>'value2',* @paramstring$modules 多个模块之间用半角逗号隔开，如：member,guestbook* @returnstring语言字符*/function L($language = 'no_language',$pars = array(), $modules = '') {static $LANG = array();static $LANG_MODULES = array();static $lang = '';if(defined('IN_ADMIN')) {$lang = SYS_STYLE ? SYS_STYLE : 'zh-cn';} else {$lang = pc_base::load_config('system','lang');}if(!$LANG) {require_once PC_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.'system.lang.php';if(defined('IN_ADMIN')) require_once PC_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.'system_menu.lang.php';if(file_exists(PC_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.ROUTE_M.'.lang.php')) require PC_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.ROUTE_M.'.lang.php';}if(!empty($modules)) {$modules = explode(',',$modules);foreach($modules AS $m) {if(!isset($LANG_MODULES[$m])) require PC_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.$m.'.lang.php';}}if(!array_key_exists($language,$LANG)) {return $LANG['no_language'].'['.$language.']';} else {$language = $LANG[$language];if($pars) {foreach($pars AS $_k=>$_v) {$language = str_replace('{'.$_k.'}',$_v,$language);}}return $language;}}/** * 模板调用 *  * @param $module * @param $template * @param $istag * @return unknown_type */function template($module = 'content', $template = 'index', $style = '') {if(strpos($module, 'plugin/')!== false) {$plugin = str_replace('plugin/', '', $module);return p_template($plugin, $template,$style);}$module = str_replace('/', DIRECTORY_SEPARATOR, $module);if(!empty($style) && preg_match('/([a-z0-9\-_]+)/is',$style)) {} elseif (empty($style) && !defined('STYLE')) {if(defined('SITEID')) {$siteid = SITEID;} else {$siteid = param::get_cookie('siteid');}if (!$siteid) $siteid = 1;$sitelist = getcache('sitelist','commons');if(!empty($siteid)) {$style = $sitelist[$siteid]['default_style'];}} elseif (empty($style) && defined('STYLE')) {$style = STYLE;} else {$style = 'default';}if(!$style) $style = 'default';$template_cache = pc_base::load_sys_class('template_cache');$compiledtplfile = PHPCMS_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';if(file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) {if(!file_exists($compiledtplfile) || (@filemtime(PC_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') > @filemtime($compiledtplfile))) {$template_cache->template_compile($module, $template, $style);}} else {$compiledtplfile = PHPCMS_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';if(!file_exists($compiledtplfile) || (file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') && filemtime(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') > filemtime($compiledtplfile))) {$template_cache->template_compile($module, $template, 'default');} elseif (!file_exists(PC_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) {showmessage('Template does not exist.'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html');}}return $compiledtplfile;}/** * 输出自定义错误 *  * @param $errno 错误号 * @param $errstr 错误描述 * @param $errfile 报错文件地址 * @param $errline 错误行号 * @return string 错误提示 */function my_error_handler($errno, $errstr, $errfile, $errline) {if($errno==8) return '';$errfile = str_replace(PHPCMS_PATH,'',$errfile);if(pc_base::load_config('system','errorlog')) {error_log('<?php exit;?>'.date('m-d H:i:s',SYS_TIME).' | '.$errno.' | '.str_pad($errstr,30).' | '.$errfile.' | '.$errline."\r\n", 3, CACHE_PATH.'error_log.php');} else {$str = '<div style="font-size:12px;text-align:left; border-bottom:1px solid #9cc9e0; border-right:1px solid #9cc9e0;padding:1px 4px;color:#000000;font-family:Arial, Helvetica,sans-serif;"><span>errorno:' . $errno . ',str:' . $errstr . ',file:<font color="blue">' . $errfile . '</font>,line' . $errline .'<br /><a href="http://faq.phpcms.cn/?type=file&errno='.$errno.'&errstr='.urlencode($errstr).'&errfile='.urlencode($errfile).'&errline='.$errline.'" target="_blank" style="color:red">Need Help?</a></span></div>';echo $str;}}/** * 提示信息页面跳转，跳转地址如果传入数组，页面会提示多个地址供用户选择，默认跳转地址为数组的第一个值，时间为5秒。 * showmessage('登录成功', array('默认跳转地址'=>'http://www.phpcms.cn')); * @param string $msg 提示信息 * @param mixed(string/array) $url_forward 跳转地址 * @param int $ms 跳转等待时间 */function showmessage($msg, $url_forward = 'goback', $ms = 1250, $dialog = '', $returnjs = '') {if(defined('IN_ADMIN')) {include(admin::admin_tpl('showmessage', 'admin'));} else {include(template('content', 'message'));}exit;}/** * 查询字符是否存在于某字符串 *  * @param $haystack 字符串 * @param $needle 要查找的字符 * @return bool */function str_exists($haystack, $needle){return !(strpos($haystack, $needle) === FALSE);}/** * 取得文件扩展 *  * @param $filename 文件名 * @return 扩展名 */function fileext($filename) {return strtolower(trim(substr(strrchr($filename, '.'), 1, 10)));}/** * 加载模板标签缓存 * @param string $name 缓存名 * @param integer $times 缓存时间 */function tpl_cache($name,$times = 0) {$filepath = 'tpl_data';$info = getcacheinfo($name, $filepath);if (SYS_TIME - $info['filemtime'] >= $times) {return false;} else {return getcache($name,$filepath);}}/** * 写入缓存，默认为文件缓存，不加载缓存配置。 * @param $name 缓存名称 * @param $data 缓存数据 * @param $filepath 数据路径（模块名称） caches/cache_$filepath/ * @param $type 缓存类型[file,memcache,apc] * @param $config 配置名称 * @param $timeout 过期时间 */function setcache($name, $data, $filepath='', $type='file', $config='', $timeout=0) {pc_base::load_sys_class('cache_factory','',0);if($config) {$cacheconfig = pc_base::load_config('cache');$cache = cache_factory::get_instance($cacheconfig)->get_cache($config);} else {$cache = cache_factory::get_instance()->get_cache($type);}return $cache->set($name, $data, $timeout, '', $filepath);}/** * 读取缓存，默认为文件缓存，不加载缓存配置。 * @param string $name 缓存名称 * @param $filepath 数据路径（模块名称） caches/cache_$filepath/ * @param string $config 配置名称 */function getcache($name, $filepath='', $type='file', $config='') {pc_base::load_sys_class('cache_factory','',0);if($config) {$cacheconfig = pc_base::load_config('cache');$cache = cache_factory::get_instance($cacheconfig)->get_cache($config);} else {$cache = cache_factory::get_instance()->get_cache($type);}return $cache->get($name, '', '', $filepath);}/** * 删除缓存，默认为文件缓存，不加载缓存配置。 * @param $name 缓存名称 * @param $filepath 数据路径（模块名称） caches/cache_$filepath/ * @param $type 缓存类型[file,memcache,apc] * @param $config 配置名称 */function delcache($name, $filepath='', $type='file', $config='') {pc_base::load_sys_class('cache_factory','',0);if($config) {$cacheconfig = pc_base::load_config('cache');$cache = cache_factory::get_instance($cacheconfig)->get_cache($config);} else {$cache = cache_factory::get_instance()->get_cache($type);}return $cache->delete($name, '', '', $filepath);}