PHP实例方法有哪些例子

function readExcel($filename, $encode = 'utf-8')
{
// import("ORG.Util.PHPExcel.IOFactory");
 import("Org/Util/PHPExcel");
 if (strpos($filename, "xlsx")) {
 $objReader = PHPExcel_IOFactory::createReader('Excel2007');
 } else {
 $objReader = PHPExcel_IOFactory::createReader('Excel5');
 }
 $objReader->setReadDataOnly(true);
 $objPHPExcel = $objReader->load($filename);
 $objWorksheet = $objPHPExcel->getActiveSheet();
 $highestRow = $objWorksheet->getHighestRow();
 $highestColumn = $objWorksheet->getHighestColumn();
 $highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn);
 $excelData = array();
 for ($row = 1; $row <= $highestRow; $row++) {
 if ((string)$objWorksheet->getCellByColumnAndRow(0, $row)->getValue() == "") continue;
 for ($col = 0; $col < $highestColumnIndex; $col++) {
 $value = (string)$objWorksheet->getCellByColumnAndRow($col, 1)->getValue();
 if ($value == "") {
 continue;
 }
 $excelData[$row - 1][] = (string)$objWorksheet->getCellByColumnAndRow($col, $row)->getValue();
 }
 }
 return $excelData;
}

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

function getImage($url,$save_dir='',$filename='',$type=1){
 if(trim($url)==''){
 return array('file_name'=>'','save_path'=>'','error'=>1);
 }
 if(trim($save_dir)==''){
 $save_dir='./';
 }
 if(trim($filename)==''){//保存文件名
 $ext = strrchr($url,'.');
 if($ext!='.gif'&&$ext!='.jpg'){
 return array('file_name'=>'','save_path'=>'','error'=>3);
 }
 $filename=time().$ext;
 }
 if(0!==strrpos($save_dir,'/')){
 $save_dir.='/';
 }
 //创建保存目录
 if(!file_exists($save_dir)&&!mkdir($save_dir,0777,true)){
 return array('file_name'=>'','save_path'=>'','error'=>5);
 }
 //获取远程文件所采用的方法
 if($type){
 $ch=curl_init();
 $timeout=5;
 curl_setopt($ch,CURLOPT_URL,$url);
 curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
 curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
 $img=curl_exec($ch);
 curl_close($ch);
 }
 else{
 ob_start();
 readfile($url);
 $img=ob_get_contents();
 ob_end_clean();
 }
 $size=strlen($img);
 echo $size;
 //文件大小
 $fp2=fopen($save_dir.$filename,'a');
 fwrite($fp2,$img);
 fclose($fp2);
 unset($img,$url);
 return array('file_name'=>$filename,'save_path'=>$save_dir.$filename,'error'=>0);
}

function show($status, $msg, $closeCurrent=false, $data=array()){
 $tmpArr = array(
 'statusCode' => $status,
 'message' => $msg,
 'closeCurrent' => $closeCurrent,
 );
 $tmpArr = array_merge($tmpArr, $data);
 exit(json_encode($tmpArr));
}

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

function base64EncodeImage ($image_file) {
 if(!file_exists($image_file)){
 return false;
 }
 $image_info = getimagesize($image_file);
 $image_data = fread(fopen($image_file, 'r'), filesize($image_file));
 $base64_image = chunk_split(base64_encode($image_data));
 return $base64_image;
}

function httpGet($url) {
 $curl = curl_init();
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($curl, CURLOPT_TIMEOUT, 500);
 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true); //这个是的ssl校验，需要验证
 curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true); //
 curl_setopt($curl, CURLOPT_URL, $url);
 $res = curl_exec($curl);
 curl_close($curl);
 return $res;
}

function httpPost($url,$post_data){
 $curl = curl_init();
 $post_data = json_encode($post_data);
 curl_setopt($ch , CURLOPT_URL , $url);
 curl_setopt($ch , CURLOPT_HEADER , 0 );
 curl_setopt( $ch, CURLOPT_POST, 1); //设置为POST方式
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch , CURLOPT_POSTFIELDS , $post_data);
 $rst = curl_exec( $ch );
 curl_close( $ch );
 return $rst;
}

function simplexml_to_array($simplexml_obj, $array_tags = array(), $strip_white = 1)
{
 if ($simplexml_obj) {
 if (count($simplexml_obj) == 0)
 return $strip_white ? trim((string)$simplexml_obj) : (string)$simplexml_obj;
 $attr = array();
 foreach ($simplexml_obj as $k => $val) {
 if (!empty($array_tags) && in_array($k, $array_tags)) {
 $attr[] = simplexml_to_array($val, $array_tags, $strip_white);
 } else {
 $attr[$k] = simplexml_to_array($val, $array_tags, $strip_white);
 }
 }
 return $attr;
 }
 return FALSE;
}

function utf8_to_unicode($char)
{
 switch (strlen($char)) {
 case 1:
 return ord($char);
 case 2:
 $n = (ord($char[0]) & 0x3f) << 6;
 $n += ord($char[1]) & 0x3f;
 return $n;
 case 3:
 $n = (ord($char[0]) & 0x1f) << 12;
 $n += (ord($char[1]) & 0x3f) << 6;
 $n += ord($char[2]) & 0x3f;
 return $n;
 case 4:
 $n = (ord($char[0]) & 0x0f) << 18;
 $n += (ord($char[1]) & 0x3f) << 12;
 $n += (ord($char[2]) & 0x3f) << 6;
 $n += ord($char[3]) & 0x3f;
 return $n;
 }
}

function str_to_unicode_word($str,$depart=' ')
{
 $arr = array();
 $str_len = mb_strlen($str,'utf-8');
 for($i = 0;$i < $str_len;$i++)
 {
 $s = mb_substr($str,$i,1,'utf-8');
 if($s != ' ' && $s != '　')
 {
 $arr[] = 'ux'.utf8_to_unicode($s);
 }
 }
 return implode($depart,$arr);
}

function getIP()
{
 static $realip;
 if (isset($_SERVER)) {
 if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
 $realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
 } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
 $realip = $_SERVER["HTTP_CLIENT_IP"];
 } else {
 $realip = $_SERVER["REMOTE_ADDR"];
 }
 } else {
 if (getenv("HTTP_X_FORWARDED_FOR")) {
 $realip = getenv("HTTP_X_FORWARDED_FOR");
 } else if (getenv("HTTP_CLIENT_IP")) {
 $realip = getenv("HTTP_CLIENT_IP");
 } else {
 $realip = getenv("REMOTE_ADDR");
 }
 }
 return $realip;
}

function createNonceStr($length = 16)
{
 $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 $str = "";
 for ($i = 0; $i < $length; $i++) {
 $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
 }
 return $str;
}

function get_age($birthday){
 if($birthday){
 list($y1,$m1,$d1) = explode("-",date("Y-m-d",$birthday));
 list($y2,$m2,$d2) = explode("-",date("Y-m-d",time()));
 $age = $y2-$y1;
 if(intval($m2.$d2) < intval($m1.$d1)) {$age -= 1;}
 return $age;
 }else{
 return "未知";
 }
}

function getDistance($lat1, $lng1, $lat2, $lng2)
{
 $earthRadius = 6367000; 
 $lat1 = ($lat1 * pi() ) / 180;
 $lng1 = ($lng1 * pi() ) / 180;
 $lat2 = ($lat2 * pi() ) / 180;
 $lng2 = ($lng2 * pi() ) / 180;
 $calcLongitude = $lng2 - $lng1;
 $calcLatitude = $lat2 - $lat1;
 $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
 $stepTwo = 2 * asin(min(1, sqrt($stepOne)));
 $calculatedDistance = $earthRadius * $stepTwo;
 return round($calculatedDistance);
}