php常用杂项

1.对_GET,_POST 参数进行转义

/**
 * 递归方式的对变量中的特殊字符进行转义
 */
function addslashes_deep($value)
{
    if(empty($value))
    {
         return $value;
    }
    else
    {
        return is_array($value) ? array_map('addslashes_deep', $value) : addslashes($value);
    }
}

/* 对用户传入的变量进行转义操作。*/
if (!get_magic_quotes_gpc())
{
    if (!empty($_GET))
    {
        $_GET  = addslashes_deep($_GET);
    }
    if (!empty($_POST))
    {
        $_POST = addslashes_deep($_POST);
    }

    $_COOKIE   = addslashes_deep($_COOKIE);
    $_REQUEST  = addslashes_deep($_REQUEST);
}

2.获取文件后缀名,并判断是否合法

/**
 * 获取文件后缀名,并判断是否合法
 *
 * @param string $file_name
 * @param array $allow_type
 * @return blob
 */
function get_file_suffix($file_name, $allow_type = array())
{
    //$file_suffix = strtolower(array_pop(explode('.', $file_name)));
    $file_suffix = strtolower(strrchr($file_name,'.'));
   
    if (empty($allow_type))
    {
        return $file_suffix;
    }
    else
    {
        if (in_array($file_suffix, $allow_type))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}
var_dump(get_file_suffix(('a.txt'),array('.gif','.bmp')));

3.验证输入的邮件地址是否合法

/**
 * 验证输入的邮件地址是否合法
 *
 * @access  public
 * @param   string      $email      需要验证的邮件地址
 *
 * @return bool
 */
function is_email($user_email)
{
    $chars = "/^[a-z0-9]+@[a-z0-9]+\.[a-z0-9]+$/i";
    if (strpos($user_email, '@') !== false && strpos($user_email, '.') !== false)
    {
        if (preg_match($chars, $user_email))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    else
    {
        return false;
    }
}
var_dump(is_email('123@qq.cerom'));

4.电话号码替换*

/***
phone replace 13049638170  13049****70;
*/
function replacephone($phone)
{ 
     $patt="/(1[0-9]{2})[0-9]{5}([0-9]{3})/";
     $replace = "$1****$2";
     $phone = preg_replace($patt,$replace, $phone);
     echo $phone;
}
或
echo substr_replace($phone,'****',3,4);

5.无限分级

/**无限级分类***/
$area = array(
    0=>array('cat_id'=>1,'cat_name'=>'北京市','parent_id'=>0),
    1=>array('cat_id'=>2,'cat_name'=>'馆陶县','parent_id'=>5),
    2=>array('cat_id'=>3,'cat_name'=>'海淀区','parent_id'=>1),
    3=>array('cat_id'=>4,'cat_name'=>'朝阳区','parent_id'=>1),
    4=>array('cat_id'=>5,'cat_name'=>'邯郸市','parent_id'=>6),
    5=>array('cat_id'=>6,'cat_name'=>'河北省','parent_id'=>0),
);
//由父辈向下找子孙
function catsort($arr,$parent_id = 0,$len = 0)
{ 

    static $res = array(); 
    foreach ($arr as $key => $val) {
        if($val['parent_id'] == $parent_id)
        { 

            $val['len'] = $len + 1;
            $res[] = $val;
            catsort($arr,$val['cat_id'],$val['len']);
        }

    }
    return $res;
}
//由父辈向下找子孙
function catsort2($arr,$parent_id = 0,$len = 0)
{ 

    $res = array(); 
    foreach ($arr as $key => $val) {
        if($val['upid'] == $parent_id)
        { 
            $val['children'] = catsort2($arr,$val['id']);
            $res[] = $val;
        }
    }
    return $res;
}

//由子孙像父辈找
function tree($arr,$cat_id = 4)
{ 
    static $tree = array();
    foreach ($arr as $key => $val) {
        if($val['cat_id'] == $cat_id)
        { 
            $tree[] = $val;
            tree($arr,$val['parent_id']);
        }
    }
    return $tree;
}

6.php下载远程图片

function dlPicuter($url,$path) {
    if(!is_dir($path))
    { 
        mkdir($path,0755,true);
    }
    if(preg_match('/https:\/\/.*?\.png/is',$url))
    {
        $save_filename = date('YmdHis').'.jpg';
        try{
            $content = @file_get_contents($url);
            if($content != "")
            {
                file_put_contents($path.$save_filename,$content);
                return $path.$save_filename;
            }
            else {
                return '';
            }
        }catch(Exception $e)
        { 
        }
    }
 }
echo  dlPicuter('https://www.baidu.com/img/bdlogo.png','./pp/');

7.gbk-uft8转码

 ///php UFT-8 ---> GBK;
 $html = mb_convert_encoding($html, 'GBK', 'UTF-8');
///gbk -->utf-8
 iconv("GBK","UTF-8",$html);

8.中文如乱码截取

function jiequ($str,$len="24")
{ 
    return mb_substr($str,0,$len,"UTF-8");
}

9.过滤非法参数

//过滤非法的参数
function parts(array $array, array $keys)
{
    foreach (array_keys($array) as $key) {
        if (!in_array($key, $keys)) {
            unset($array[$key]);
        }
    }

    return $array;
}

//parts($_POST,['id','name','password','insertime']);

10.判断是否缺少必要的参数

//判断是否缺少必要的参数
function requireds(array $array, array $keys, $strictMode = false)
{
    foreach ($keys as $key) {
        if (!array_key_exists($key, $array)) {
            return false;
        }
        if ($strictMode && (is_null($array[$key]) || $array[$key] === "" || $array[$key] === 0)) {
            return false;
        }
    }

    return true;
}

11.curl 的POST与GET

/** 
* Send a POST requst using cURL 
* @param string $url to request 
* @param array $post values to send 
* @param array $options for cURL 
* @return string 
*/ 
function curl_post($url, array $post = NULL, array $options = array()) 
{ 
    $defaults = array( 
        CURLOPT_POST => 1, 
        CURLOPT_HEADER => 0, 
        CURLOPT_URL => $url, 
        CURLOPT_FRESH_CONNECT => 1, 
        CURLOPT_RETURNTRANSFER => 1, 
        CURLOPT_FORBID_REUSE => 1, 
        CURLOPT_TIMEOUT => 4, 
        CURLOPT_POSTFIELDS => http_build_query($post) 
    ); 

    $ch = curl_init(); 
    curl_setopt_array($ch, ($options + $defaults)); 
    if( ! $result = curl_exec($ch)) 
    { 
        trigger_error(curl_error($ch)); 
    } 
    curl_close($ch); 
    return $result; 
} 

/** 
* Send a GET requst using cURL 
* @param string $url to request 
* @param array $get values to send 
* @param array $options for cURL 
* @return string 
*/ 
function curl_get($url, array $get = NULL, array $options = array()) 
{    
    $defaults = array( 
        CURLOPT_URL => $url. (strpos($url, '?') === FALSE ? '?' : ''). http_build_query($get), 
        CURLOPT_HEADER => 0, 
        CURLOPT_RETURNTRANSFER => TRUE, 
        CURLOPT_TIMEOUT => 4 
    ); 
    
    $ch = curl_init(); 
    curl_setopt_array($ch, ($options + $defaults)); 
    if( ! $result = curl_exec($ch)) 
    { 
        trigger_error(curl_error($ch)); 
    } 
    curl_close($ch); 
    return $result; 
} 

12.openssl对文件／字符串加密解密

class Mycrypt{ 
    private $passwd = ''; //字符串长度必须是13位
    private $sign = ''; //字符长度必须是16位
    public function __construct($passwd = 'sjhfjewQ!dlfg',$sign = 'JAqwo12U!@askdas')
    { 
        $this->passwd = $passwd;
        $this->sign = $sign;
    }
    private function sslPrm()
    {
        return array($this->passwd,$this->sign,"aes-256-cbc");
    }
    public function sslEnc($msg)
    {
        list ($pass, $iv, $method)= $this->sslPrm();
        if(function_exists('openssl_encrypt'))
        {
            return urlencode(openssl_encrypt(urlencode($msg), $method, $pass, false, $iv));
        }
        else
        {
            return urlencode(exec("echo \"".urlencode($msg)."\" | openssl enc -".urlencode($method)." -base64 -nosalt -K ".bin2hex($pass)." -iv ".bin2hex($iv)));
        }
    }
    public  function sslDec($msg)
    {
        list ($pass, $iv, $method) = $this->sslPrm();
        if(function_exists('openssl_decrypt'))
        {
            return trim(urldecode(openssl_decrypt(urldecode($msg), $method, $pass, false, $iv)));
        }
        else
        {
            return trim(urldecode(exec("echo \"".urldecode($msg)."\" | openssl enc -".$method." -d -base64 -nosalt -K ".bin2hex($pass)." -iv ".bin2hex($iv))));
        }
    }

}

13.加密解密

function encryptDecrypt($string, $key="password", $decrypt="DECODE"){ 
    if($decrypt){ 
        $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "12"); 
        return $decrypted; 
    }else{ 
        $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key)))); 
        return $encrypted; 
    } 
}

14. 导出CSV

public function exportToCsv($fileName = '', $headArr = [], $data = [])
    {
        
        @ob_end_clean();  //清除内存
        ob_start();
        @header("Content-Type: text/csv");
        @header("Content-Disposition:filename=".$fileName.'.csv');
        $fp=fopen('php://output','w');
        fwrite($fp, chr(0xEF).chr(0xBB).chr(0xBF));
        fputcsv($fp,$headArr);
        $index = 0;
        foreach ($data as $item) {
            if($index==1000){ //每次写入1000条数据清除内存
                $index=0;
                ob_flush();//清除内存
                flush();
            }
            $index++;
            fputcsv($fp,$item);
        }
 
        @ob_flush();
        flush();
        ob_end_clean();
        return;
    }