PHP安全检测代码片段(分享)_php技巧

代码如下:
/**
* html转换输出（只转义' " 保留Html正常运行)
* @param $param
* @return string
*/
function htmlEscape($param) {
return trim(htmlspecialchars($param, ENT_QUOTES));
}

/**
* 是否数组（同时检测数组中是否存在值）
* @param $params
* @return boolean
*/
function isArray($params) {
return (!is_array($params) || !count($params)) ? false : true;
}

/**
* 变量是否在数组中存在（参数容错， 字符串是否存在于数组中)
* @param $param
* @param $params
* @return boolean
*/
function inArray($param, $params) {
return (!in_array((string)$param, (array)$params)) ? false : true;
}

/**
* 通用多类型混合转义函数
* @param $var
* @param $strip
* @param $isArray
* @return mixture
*/
function sqlEscape($var, $strip = true, $isArray = false) {
if (is_array($var)) {
if (!$isArray) return " '' ";
foreach ($var as $key => $value) {
$var[$key] = trim(S::sqlEscape($value, $strip));
}
return $var;
} elseif (is_numeric($var)) {
return " '" . $var . "' ";
} else {
return " '" . addslashes($strip ? stripslashes($var) : $var) . "' ";
}
}

/**
* 获取服务器变量
* @param $keys
* @return string
*/
function getServer($keys) {
$server = array();
$array = (array) $keys;
foreach ($array as $key) {
$server[$key] = NULL;
if (isset($_SERVER[$key])) {
$server[$key] = str_replace(array('<','>','"',"'",'%3C','%3E','%22','%27','%3c','%3e'), '', $_SERVER[$key]);
}
}
return is_array($keys) ? $server : $server[$keys];
}

/**
* 变量转义
* @param $array
*/
function slashes(&$array) {
if (is_array($array)) {
foreach ($array as $key => $value) {
if (is_array($value)) {
S::slashes($array[$key]);
} else {
$array[$key] = addslashes($value);
}
}
}
}

/**
* 目录转换
* @param unknown_type $dir
* @return string
*/
function escapeDir($dir) {
$dir = str_replace(array("'",'#','=','`','$','%','&',';'), '', $dir);
return rtrim(preg_replace('/(\/){2,}|(\\\){1,}/', '/', $dir), '/');
}
/**
* 通用多类型转换
* @param $mixed
* @param $isint
* @param $istrim
* @return mixture
*/
function escapeChar($mixed, $isint = false, $istrim = false) {
if (is_array($mixed)) {
foreach ($mixed as $key => $value) {
$mixed[$key] = S::escapeChar($value, $isint, $istrim);
}
} elseif ($isint) {
$mixed = (int) $mixed;
} elseif (!is_numeric($mixed) && ($istrim ? $mixed = trim($mixed) : $mixed) && $mixed) {
$mixed = S::escapeStr($mixed);
}
return $mixed;
}
/**
* 字符转换
* @param $string
* @return string
*/
function escapeStr($string) {
$string = str_replace(array("\0","%00","\r"), '', $string); //modified@2010-7-5
$string = preg_replace(array('/[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F]/','/&(?!(#[0-9]+|[a-z]+);)/is'), array('', '&'), $string);
$string = str_replace(array("%3C",'<'), '<', $string);
$string = str_replace(array("%3E",'>'), '>', $string);
$string = str_replace(array('"',"'","\t",' '), array('"',''',' ',' '), $string);
return $string;
}
/**
* 变量检查
* @param $var
*/
function checkVar(&$var) {
if (is_array($var)) {
foreach ($var as $key => $value) {
S::checkVar($var[$key]);
}
} elseif (P_W != 'admincp') {
$var = str_replace(array('..',')','<','='), array('..',')','<','='), $var);
} elseif (str_replace(array(' global $basename;
$basename = 'javascript:history.go(-1);';
adminmsg('word_error');
}
}