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PHP实例方法有哪些例子

时间：2021-07-01 10:21:17 帮助过：32人阅读

PHP实例方法的例子有：1、PHPExcel读取Excel，2、获取文本中首张图片地址；3、将图片保存到本地；4、返回JSON数据；5、【var_dump】函数改写；6、图片转为base64格式等等。

PHP实例方法的例子有：

  • PHPExcel 读取Excel

  • 获取文本中首张图片地址

  • 将图片保存到本地

  • 返回JSON数据

  • var_dump 函数改写

  • 图片转为base64格式

  • 使用curl 实现get请求

  • 使用curl 实现post请求

  • 简单的xml转数组方法

  • Utf-8转统一码

  • 字符串转统一编码

  • 获取IP地址

  • 创建随机字符串

  • 根据生日获取年龄

  • 根据经纬度计算距离

PHPExcel 读取excel

  1. function readExcel($filename, $encode = 'utf-8')
  2. {
  3. //    import("ORG.Util.PHPExcel.IOFactory");
  4.     import("Org/Util/PHPExcel");
  5.     if (strpos($filename, "xlsx")) {
  6.         $objReader = PHPExcel_IOFactory::createReader('Excel2007');
  7.     } else {
  8.         $objReader = PHPExcel_IOFactory::createReader('Excel5');
  9.     }
  10.     $objReader->setReadDataOnly(true);
  11.     $objPHPExcel = $objReader->load($filename);
  12.     $objWorksheet = $objPHPExcel->getActiveSheet();
  13.     $highestRow = $objWorksheet->getHighestRow();
  14.     $highestColumn = $objWorksheet->getHighestColumn();
  15.     $highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn);
  16.     $excelData = array();
  17.     for ($row = 1; $row <= $highestRow; $row++) {
  18.         if ((string)$objWorksheet->getCellByColumnAndRow(0, $row)->getValue() == "") continue;
  19.         for ($col = 0; $col < $highestColumnIndex; $col++) {
  20.             $value = (string)$objWorksheet->getCellByColumnAndRow($col, 1)->getValue();
  21.             if ($value == "") {
  22.                 continue;
  23.             }
  24.             $excelData[$row - 1][] = (string)$objWorksheet->getCellByColumnAndRow($col, $row)->getValue();
  25.         }
  26.     }
  27.     return $excelData;
  28. }

获取文本中首张图片地址

  1. function getFirstPic($content){
  2.     if(preg_match_all("/(src)=([\"|']?)([^ \"'>]+\.(gif|jpg|jpeg|bmp|png))\\2/i", $content, $matches)){
  3.         $str=$matches[3][0];
  4.         if(preg_match('/\/ueditor\/php\/upload\/image/',$str)){
  5.             return $str1=substr($str,6);
  6.         }
  7.     }
  8. }

将图片保存到本地

  1. function getImage($url,$save_dir='',$filename='',$type=1){
  2.     if(trim($url)==''){
  3.         return array('file_name'=>'','save_path'=>'','error'=>1);
  4.     }
  5.     if(trim($save_dir)==''){
  6.         $save_dir='./';
  7.     }
  8.     if(trim($filename)==''){//保存文件名
  9.         $ext = strrchr($url,'.');
  10.         if($ext!='.gif'&&$ext!='.jpg'){
  11.             return array('file_name'=>'','save_path'=>'','error'=>3);
  12.         }
  13.         $filename=time().$ext;
  14.     }
  15.     if(0!==strrpos($save_dir,'/')){
  16.         $save_dir.='/';
  17.     }
  18.     //创建保存目录
  19.     if(!file_exists($save_dir)&&!mkdir($save_dir,0777,true)){
  20.         return array('file_name'=>'','save_path'=>'','error'=>5);
  21.     }
  22.     //获取远程文件所采用的方法
  23.     if($type){
  24.         $ch=curl_init();
  25.         $timeout=5;
  26.         curl_setopt($ch,CURLOPT_URL,$url);
  27.         curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
  28.         curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
  29.         $img=curl_exec($ch);
  30.         curl_close($ch);
  31.     }
  32.     else{
  33.         ob_start();
  34.         readfile($url);
  35.         $img=ob_get_contents();
  36.         ob_end_clean();
  37.     }
  38.     $size=strlen($img);
  39.     echo $size;
  40.     //文件大小
  41.     $fp2=fopen($save_dir.$filename,'a');
  42.     fwrite($fp2,$img);
  43.     fclose($fp2);
  44.     unset($img,$url);
  45.     return array('file_name'=>$filename,'save_path'=>$save_dir.$filename,'error'=>0);
  46. }

返回JSON数据

  1. function show($status, $msg, $closeCurrent=false, $data=array()){
  2.     $tmpArr = array(
  3.         'statusCode' => $status,
  4.         'message'    => $msg,
  5.         'closeCurrent' => $closeCurrent,
  6.     );
  7.     $tmpArr = array_merge($tmpArr, $data);
  8.     exit(json_encode($tmpArr));
  9. }

var_dump 函数改写

  1. function lyl_dump($content){
  2.     header("Content-type:text/html;charset=utf-8");
  3.     echo '<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />';
  4.     echo "<pre>";
  5.     var_dump($content);
  6.     echo "<pre/>";
  7.     die;
  8. }

图片转为base64格式

  1. function base64EncodeImage ($image_file) {
  2.     if(!file_exists($image_file)){
  3.         return false;
  4.     }
  5.     $image_info = getimagesize($image_file);
  6.     $image_data = fread(fopen($image_file, 'r'), filesize($image_file));
  7.     $base64_image = chunk_split(base64_encode($image_data));
  8.     return $base64_image;
  9. }

使用curl 实现get请求

  1. function httpGet($url) {
  2.     $curl = curl_init();
  3.     curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
  4.     curl_setopt($curl, CURLOPT_TIMEOUT, 500);
  5.     curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true); //这个是的ssl校验，需要验证
  6.     curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true); //
  7.     curl_setopt($curl, CURLOPT_URL, $url);
  8.     $res = curl_exec($curl);
  9.     curl_close($curl);
  10.     return $res;
  11. }

使用curl 实现post 请求

  1. function httpPost($url,$post_data){
  2.     $curl = curl_init();
  3.     $post_data = json_encode($post_data);
  4.     curl_setopt($ch , CURLOPT_URL , $url);
  5.     curl_setopt($ch , CURLOPT_HEADER , 0 );
  6.     curl_setopt( $ch, CURLOPT_POST, 1);          //设置为POST方式
  7.     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  8.     curl_setopt($ch , CURLOPT_POSTFIELDS , $post_data);
  9.     $rst = curl_exec( $ch );
  10.     curl_close( $ch );
  11.     return $rst;
  12. }

简单的xml转数组方法

  1. function simplexml_to_array($simplexml_obj, $array_tags = array(), $strip_white = 1)
  2. {
  3.     if ($simplexml_obj) {
  4.         if (count($simplexml_obj) == 0)
  5.             return $strip_white ? trim((string)$simplexml_obj) : (string)$simplexml_obj;
  6.         $attr = array();
  7.         foreach ($simplexml_obj as $k => $val) {
  8.             if (!empty($array_tags) && in_array($k, $array_tags)) {
  9.                 $attr[] = simplexml_to_array($val, $array_tags, $strip_white);
  10.             } else {
  11.                 $attr[$k] = simplexml_to_array($val, $array_tags, $strip_white);
  12.             }
  13.         }
  14.         return $attr;
  15.     }
  16.     return FALSE;
  17. }

Utf-8转统一码

  1. function utf8_to_unicode($char)
  2. {
  3.     switch (strlen($char)) {
  4.         case 1:
  5.             return ord($char);
  6.         case 2:
  7.             $n = (ord($char[0]) & 0x3f) << 6;
  8.             $n += ord($char[1]) & 0x3f;
  9.             return $n;
  10.         case 3:
  11.             $n = (ord($char[0]) & 0x1f) << 12;
  12.             $n += (ord($char[1]) & 0x3f) << 6;
  13.             $n += ord($char[2]) & 0x3f;
  14.             return $n;
  15.         case 4:
  16.             $n = (ord($char[0]) & 0x0f) << 18;
  17.             $n += (ord($char[1]) & 0x3f) << 12;
  18.             $n += (ord($char[2]) & 0x3f) << 6;
  19.             $n += ord($char[3]) & 0x3f;
  20.             return $n;
  21.     }
  22. }

字符串转统一编码

  1. function str_to_unicode_word($str,$depart=' ')
  2. {
  3.     $arr = array();
  4.     $str_len = mb_strlen($str,'utf-8');
  5.     for($i = 0;$i < $str_len;$i++)
  6.     {
  7.         $s = mb_substr($str,$i,1,'utf-8');
  8.         if($s != ' ' && $s != '　')
  9.         {
  10.             $arr[] = 'ux'.utf8_to_unicode($s);
  11.         }
  12.     }
  13.     return implode($depart,$arr);
  14. }

获取IP地址

  1. function getIP()
  2. {
  3.     static $realip;
  4.     if (isset($_SERVER)) {
  5.         if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
  6.             $realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
  7.         } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
  8.             $realip = $_SERVER["HTTP_CLIENT_IP"];
  9.         } else {
  10.             $realip = $_SERVER["REMOTE_ADDR"];
  11.         }
  12.     } else {
  13.         if (getenv("HTTP_X_FORWARDED_FOR")) {
  14.             $realip = getenv("HTTP_X_FORWARDED_FOR");
  15.         } else if (getenv("HTTP_CLIENT_IP")) {
  16.             $realip = getenv("HTTP_CLIENT_IP");
  17.         } else {
  18.             $realip = getenv("REMOTE_ADDR");
  19.         }
  20.     }
  21.     return $realip;
  22. }

创建随机字符串

  1. function createNonceStr($length = 16)
  2. {
  3.     $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  4.     $str = "";
  5.     for ($i = 0; $i < $length; $i++) {
  6.         $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  7.     }
  8.     return $str;
  9. }

根据生日获取年龄

  1. function get_age($birthday){
  2.     if($birthday){
  3.         list($y1,$m1,$d1) = explode("-",date("Y-m-d",$birthday));
  4.         list($y2,$m2,$d2) = explode("-",date("Y-m-d",time()));
  5.         $age = $y2-$y1;
  6.         if(intval($m2.$d2) < intval($m1.$d1)) {$age -= 1;}
  7.         return $age;
  8.     }else{
  9.         return "未知";
  10.     }
  11. }

根据经纬度计算距离

  1. function getDistance($lat1, $lng1, $lat2, $lng2)
  2. {
  3.     $earthRadius = 6367000; 
  4.     $lat1 = ($lat1 * pi() ) / 180;
  5.     $lng1 = ($lng1 * pi() ) / 180;
  6.     $lat2 = ($lat2 * pi() ) / 180;
  7.     $lng2 = ($lng2 * pi() ) / 180;
  8.     $calcLongitude = $lng2 - $lng1;
  9.     $calcLatitude = $lat2 - $lat1;
  10.     $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
  11.     $stepTwo = 2 * asin(min(1, sqrt($stepOne)));
  12.     $calculatedDistance = $earthRadius * $stepTwo;
  13.     return round($calculatedDistance);
  14. }

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