php常用代码
$total_count = mysql_num_rows($rslt);//返回记录条数
date("ymdHis");//130618104741 注:年份没有前两位 PHP手册:y 2 位数字表示的年份 例如：99 或 03
date("I");//是否为夏令时
date("U");//从 Unix 纪元（January 1 1970 00:00:00 GMT）开始至今的秒数;同time();
date_default_timezone_set('PRC'); //默认时区
echo "今天:",date("Y-m-d",time()),"<br>";
echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"<br>";
echo "昨天:",date("Y-m-d",strtotime("-1 day")), "<br>";
echo "明天:",date("Y-m-d",strtotime("+1 day")), "<br>";
echo "一周后:",date("Y-m-d",strtotime("+1 week")), "<br>";
echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "<br>";
echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")), "<br>";
echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."<br>";
echo "一个月前:".date("Y-m-d",strtotime("last month"))."<br>";
echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."<br>";
echo "十年后:".date("Y-m-d",strtotime("+10 year"))."<br>";
echo (strtotime('2020-5-20′)-strtotime(date(“Y-m-d”)))/86400; //php判断一个日期距今天还有多少天
$efp = fopen ("/tmp/debug.txt", "a");//可用于ajax调试中记录变量的值,file_put_contents("/tmp/debug.txt",$temp,FILE_APPEND);也可做同样的功能
fwrite($efp, "222222222\n");
fclose($efp);
$_SERVER['HTTP_HOST'];//服务器ip
getenv("REMOTE_ADDR");//客户端ip
substr(strrchr($str,'/'),1);//取url中的文件名 如:http://www.test.com/a.txt,将取出a.txt
#从命令行读取数据
$stdin = fopen ('php://stdin', 'r');
while (true)
{
$command = trim (fgets ($stdin, 1024));
echo $command ."\n";
}
#将windows下的换行替换成linux下的换行
file_put_contents('/tmp/test.txt',str_replace("\r\n","\n",$str));
#输出当前函数的调用关系
//除非数组是被引用，foreach 所操作的是指定数组的一个拷贝，而不是该数组本身。[php手册中对foreach的说明]
$data = array("a","b","c","d","e");
foreach($data as $i=>$item)
{
var_dump($data);
$data=array(); //虽然这里清空了变量，但是循环还是照常进行
$data['index']=$i;
$data['data']=$item;
$data['widget']=$this;
echo "$item===\n";
}
#zend5.5中文乱码
配置文件中的desktop_options.xml中的editing.encoding选项修改成"UTF-8"(必须大写)
C:/Documents and Settings/用户名/ZDE/config_5.5/desktop_options.xml
#获取刚插入数据的id
$stmtA = "select LAST_INSERT_ID() LIMIT 1;";
$rslt = mysql_query($stmtA, $link);
$row = mysql_fetch_array($rslt);
$id = $row[0];
#php cli下接收参数数组
$argv
#mysql 获取一小时前时间
select date_sub(now(), interval 1 hour);
select date_sub(now(), interval -1 hour); //一小时后
select date_add(now(), interval 1 hour); //一小时后, 更多可选值参考[1] [2]
#查看数据库中所有表的记录数 [1] select table_name,table_rows from information_schema.tables where TABLE_SCHEMA = 'test' order by table_name desc; #php检测字符串编码 echo mb_detect_encoding($str); echo mb_detect_encoding($str, array('ASCII', 'UTF-8', 'GB2312', 'GBK', 'BIG5')); echo iconv('GB2312', 'UTF-8', $str); //将字符串编码从gbk转换成utf-8 #php判断中文文件名 $realname = iconv('UTF-8','GB2312',"C:\Documents and Settings\用户名\My Documents\下载\CentOS-6.5-i386-minimal.iso"); var_dump(file_exists($realname)); #php求文件的sha1sum echo sha1_file($realname); #php求文件的sha256 echo hash_file("sha256", $realname); #简单性能测试 function run_count_one_sec() { $time = time(); $i = 0; while ($time == time()) { //================Code Begin //push_info(); //1806 //file_exists("config.php"); //318556 //include_once("config.php"); //323724 //================Code End $i++; //2660728 } return $i; } $run_times_sec = array(); for($j = 0; $j <3; $j++) { $run_times_sec[$j] = run_count_one_sec(); } var_dump($run_times_sec); echo intval(($run_times_sec[1] + $run_times_sec[2])/2) . "\n"; #显示表中的所有字段 SHOW FULL FIELDS FROM users; SHOW KEYS FROM users; #CI中上传文件时生成随机文件名的方法 $filename = md5(uniqid(mt_rand())); echo uniqid('php_' . mt_rand()) . "<br />";//生成一个php前辍 #curl使用seesion和cookie function get_url_content($url,$post_data = null,$time_out = 30,$cookie_file = ''){ $cookiefile = dirname(__FILE__).DIRECTORY_SEPARATOR.'tmp'. DIRECTORY_SEPARATOR ."test_$cookie_file.txt"; if(!file_exists($cookiefile)){file_put_contents($cookiefile,"");} $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt( $ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); curl_setopt( $ch, CURLOPT_COOKIEJAR, $cookiefile); //指定保存cookie和session的文件 curl_setopt( $ch, CURLOPT_COOKIEFILE,$cookiefile); //指定发送给服务器的cookie和session文件 // POST数据 curl_setopt($ch, CURLOPT_POST, 1); // 把post的变量加上 curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); curl_setopt($ch, CURLOPT_TIMEOUT,$time_out); $output = curl_exec($ch); curl_close($ch); return $output; } function get_url_content($url, $post_data = null, $time_out = 30, $cookie_file = '', $request_type = 'GET'){ $cookiefile = dirname(__FILE__).DIRECTORY_SEPARATOR.'tmp'. DIRECTORY_SEPARATOR ."cookie_$cookie_file.txt"; if(!file_exists($cookiefile)){file_put_contents($cookiefile,"");} $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //$user_agent = 'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.93 Safari/537.36'; //curl_setopt( $ch, CURLOPT_USERAGENT, $user_agent/*$_SERVER['HTTP_USER_AGENT']*/); //Curl增加 header $headers = array( "User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65", //"Accept: application/json, text/javascript, */*; q=0.01", ); curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers); curl_setopt( $ch, CURLOPT_COOKIEJAR, $cookiefile); //指定保存cookie和session的文件 curl_setopt( $ch, CURLOPT_COOKIEFILE,$cookiefile); //指定发送给服务器的cookie和session文件 //curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,FALSE); //不认证证书 //curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,FALSE); if($request_type == 'POST'){ curl_setopt($ch, CURLOPT_POST, 1); // 标识要POST数据 curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); // 把POST的变量加上 } curl_setopt($ch, CURLOPT_TIMEOUT,$time_out); $output = curl_exec($ch); //$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); // 如果返回非200可做日志记录 curl_close($ch); return $output; } #格式化成等宽字符串，不足前面补0 echo sprintf("%04d", 1); #通过file_get_contents函数Post数据 function http_post($post_data,$url) { $context = array( 'http' => array( 'method' => 'POST', 'header' => 'Content-type: application/x-www-form-urlencoded', 'content' => http_build_query($post_data) ) ); $stream_post_data = stream_context_create($context); $result = file_get_contents($url, false, $stream_post_data); return $result; } #给file_get_contents设置超时 echo @file_get_contents("http://localhost/test.php?a=1", false, stream_context_create(['http'=>['method'=>"GET",'timeout'=>3]])); #mysql时间戳转时期时间 SELECT *, FROM_UNIXTIME( created_at, '%Y-%m-%d %H:%i:%s' ) as date1 FROM `user`; #新建表 CREATE DATABASE `test2` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; #php通过Zip打包文件 $zip = new ZipArchive; $res = $zip->open('test.zip', ZipArchive::CREATE); if ($res === TRUE) { $zip->addFromString('test.txt', 'file content goes here'); $zip->addFile('info.txt', 'entryname.txt'); $zip->close(); echo 'ok'; } else { echo 'failed'; } #获取当前目录 define('APP_PATH', dirname(__FILE__) . '/'); #获取php的输出缓存 ob_start(); phpinfo(); $out = ob_get_contents(); ob_end_clean(); file_put_contents(APP_PATH . 'phpinfo.txt', $out); #将表的自增ID修改成指定数字 alter table user auto_increment = 1001; #Chrome 自带了一个功能非常强大的 HTTP 抓包系统 [1] chrome://net-internals/#events #mysql将行中的字段连接 SELECT GROUP_CONCAT(taskNumber SEPARATOR "' , '") AS taskNumber FROM workorder where id < 12510 #如果在命令行换行符不需要br标签 if(PHP_SAPI == 'cli'){ $br = "\n"; } else { $br = "<br />\n"; } #json字符串decode时如果里面存在很大的数字可以添加转换标识将大数转换成字符串 json_decode($json_str, true, 512, JSON_BIGINT_AS_STRING) #只能为中文的简单过滤 if($name != "" && !preg_match('/^[-a-zA-Z0-9\x{4e00}-\x{9fa5}]{1,20}$/u', $name)){ // } #取文件扩展名 function getFileExt($filename) { return strtolower(strrchr($filename, '.')); } function get_file_ext($file_name = '') { if ($file_name != '' && strpos($file_name, '.')) { $file_path_info = pathinfo($file_name); return $file_path_info['extension']; } return ''; } echo getFileExt("/img/20180606/u_1528251036985944.jpg");//.jpg #去除json配置文件中的"/**/"注释 json_decode(preg_replace("/\/\*[\s\S]+?\*\//", "", file_get_contents("config.json")), true) #PHP中浮点数处理 [1] echo intval(9.7 * 100); //969 echo intval(strval(9.7 * 100)); //970 #php解析url后的查询字符串 $url = "http://localhost/hello?a=1&b=2"; $query_str_arr = []; try{ $query_str = substr($url, strpos($url, "?") + 1); parse_str($query_str, $query_str_arr); } catch (Exception $e) { // } var_dump($query_str_arr);//['a' => 1, 'b' => 1] #PhpStorm中注释一个变量类型 /* @var $dbh \PDO */ #将图片编码为base64字符串 [1] function base64_encode_image ($filename=string,$filetype=string) { if ($filename) { $imgbinary = fread(fopen($filename, "r"), filesize($filename)); return 'data:image/' . $filetype . ';base64,' . base64_encode($imgbinary); } } #乱码处理 $str1 = "鏁版嵁鍖哄煙鑳屾櫙鍙樺寲"; echo mb_convert_encoding($str1, "GBK", "UTF-8");
posted on 2013-06-18 09:35 dream_bccb 阅读(522) 评论(0) 收藏 举报
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