Check if table exists in database 说明 public mysql_xdevapi\Table::existsInDatabase ( void ) : bool Verifies if this table exists in the database. 参数 此函数没有参数。返回值 Returns TRUE if table exists in the database, else FALSE if it does not. ...
'/')) { $filter: "intval"if (1 !== preg_match($filters, (string) $data)) {// 支持正则验证return isset($default) ? $default : null;}} else {$filters = explode(',', $filters);}} elseif (is_int($filters)) {$filters = array($...
$%', $pathInfo, $matches)) { // check $matches[1] and $matches[3] to see // if they match a manufacturer and a model in the database // If so, set $_GET['manufacturer'] and/or $_GET['model'] // and return 'car/index' } return false; // this rule does not apply } ...
database, allowing your team to define and share the application's database schema definition. If you have ever had to tell a teammate to manually add a column to their local database schema after pulling in your changes from source control, you've faced the problem that database migrations...
{return"image/jpeg";}if($bytes=="\x89PNG\x0d\x0a"){return"image/png";}if($bytes=="GIF87a"or$bytes=="GIF89a"){return"image/gif";}}return'unknown';}if(isset($_POST['submit'])){if(file_exists(UPLOAD_PATH)){$temp_file=$_FILES['upload_file']['tmp_name'];$file_type=get...
3Schema::dropIfExists('users'); Renaming Tables With Foreign Keys Before renaming a table, you should verify that any foreign key constraints on the table have an explicit name in your migration files instead of letting Laravel assign a convention based name. Otherwise, the foreign key constrain...
<?php// 声明functionfoo(){// function body}// 条件判断if(!function_exists('bar')){functionbar(){// function body}} 命名空间和类: 命名空间和类必须遵循PSR-4自动加载器标准。 类的名称: 每个类都有自己的命名空间,且都在顶级命名空间下,类名必须使用驼峰式(CamelCase)。 PHP 5.3 及以上,必须使...
Swoole\Timer::after(1000,function()use($id){if(!Swoole\Timer::exists($id)) {echo"✅ All right!\n"; } }); The way of coroutine go(function(){ $i =0;while(true) { Co::sleep(0.1);echo"📝 Do something...\n";if(++$i ===5) {echo"🛎 Done\n";break; ...
('influx_test_db');// create the database with a retention policy$result=$database->create(newRetentionPolicy('test','5d',1,true));// check if a database exists then create it if it doesn't$database=$client->selectDB('test_db');if(!$database->exists()) {$database->create(...
auth: mixed, authentication information database: int, database number ssl: array, SSL context options Class RedisException phpredis throws a RedisException object if it can't reach the Redis server. That can happen in case of connectivity issues, if the Redis service is down, or if the red...