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 $obj 需要处理的字符串或数组www.2cto.com
* @return mixed
*/
function new_html_special_chars($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(' $string = str_replace('>','>',$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 ( '/\]*?)\>/si', '', $str );
$str = preg_replace ( '/\]*?)\>/si', '', $str );
$str = preg_replace ( '/\]*?)\>/si', '', $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 $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 $t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 $tn = 1; $n++; $noc++;
} elseif(194 $tn = 2; $n += 2; $noc += 2;
} elseif(224 $tn = 3; $n += 3; $noc += 2;
} elseif(240 $tn = 4; $n += 4; $noc += 2;
} elseif(248 $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 $current_str = ord($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
*
* @return int 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 $hash .= $chars[mt_rand(0, $max)];
}
return $hash;
}

/**
* 将字符串转换为数组
*
* @param string $data 字符串
* @return array 返回数组格式，如果，data为空，则返回空数组
*/
function string2array($data) {
if($data == '') return array();
eval("\$array = $data;");
return $array;
}
/**
* 将数组转换为字符串
*
* @param array $data 数组
* @param bool $isformdata 如果为0，则不使用new_stripslashes处理，可选参数，默认为1
* @return string 返回字符串，如果，data为空，则返回空
*/
function array2string($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
*
*
* @param string $filesize 字节大小
* @return string 返回大小
*/
function sizecount($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
*
*
* @param string $txt 字符串
* @param string $operation ENCODE为加密，DECODE为解密，可选参数，默认为ENCODE，
* @param string $key 密钥：数字、字母、下划线
* @return string
*/
function sys_auth($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 $k = $i % $len;
$code .= $txt[$i] ^ $key[$k];
}
$code = $operation == 'DECODE' ? $code : base64_encode($code);
return $code;
}

/**
* 语言文件处理
*
* @param string $language 标示符
* @param array $pars 转义的数组,二维数组,'key1'=>'value1','key2'=>'value2',
* @param string $modules 多个模块之间用半角逗号隔开，如：member,guestbook
* @return string 语言字符
*/
function L($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(!emptyempty($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, $module);
if(!emptyempty($style) && preg_match('/([a-z0-9\-_]+)/is',$style)) {
} elseif (emptyempty($style) && !defined('STYLE')) {
if(defined('SITEID')) {
$siteid = SITEID;
} else {
$siteid = param::get_cookie('siteid');
}
if (!$siteid) $siteid = 1;
$sitelist = getcache('sitelist','commons');
if(!emptyempty($siteid)) {
$style = $sitelist[$siteid]['default_style'];
}
} elseif (emptyempty($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(''.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 = '

errorno:' . $errno . ',str:' . $errstr . ',file:' . $errfile . ',line' . $errline .'
Need Help?

';
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);
}

摘自chaojie2009的专栏