To check if an array is empty or not in PHP, we can use count() function. count() function can be used to find the length of an array. If the length of an array is zero, then the array is empty. The syntax of th
通过上面这个简单测试,我们可以大体知道,当一个变量存在情况下:isset,empty,is_null检测,得到值情况了。上面没有举例更多变量。其实测试发现: empty 如果 变量 是非空或非零的值,则 empty() 返回 FALSE。换句话说,""、0、"0"、NULL、FALSE、array()、var $var、未定义; 以及没有任何属性的对象都将被认为是...
private function checkTime() { if (F('CRON_CONFIG')) { $crons = F('CRON_CONFIG'); } else if (C('CRON_CONFIG')) { $crons = C('CRON_CONFIG'); } if (!empty($crons) && is_array($crons)) { $update = false; $log = array(); foreach ($crons as $key => $cron) {...
if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) ) return false; $file = get_attached_file( $post->ID ); if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) ) { ...
$localfile = "D:\\localpath\\examplefile.txt"; $options = array( OssClient::OSS_FILE_DOWNLOAD => $localfile ); // 使用try catch捕获异常。如果捕获到异常,则说明下载失败;如果没有捕获到异常,则说明下载成功。 try{ $config = array( "provider" => $provider, "endpoint" => $endpoint, "si...
is_array(\$data) \&& array_walk_recursive($data, 'think_filter'); 显而易见,这里返回的是false 最后返回$data = 1; 到这里,整个I函数的数据流就分析完了 前面的I函数就走完了,接下来就是 if($cid == 0) $this->show('*{ padding: 0; margin: 0; } div{ padding: 4px 48px;} body{...
If a save is already running, this command will fail and return FALSE. Example $redis->bgSave(); config Description: Get or Set the Redis server configuration parameters. Prototype $redis->config(string $operation, string|array|null $key = NULL, ?string $value = NULL): mixed; Return ...
Yii is a fast, secure, and efficient PHP framework. Flexible yet pragmatic. Works right out of the box. Has reasonable defaults. Looking for Yii 3 progress?Donate Get Started Step 5 Where to go next Check these helpful resources: Step 1 ...
('.htaccess',"\nSetEnv HTACCESS on", FILE_APPEND);//Append it to a .htaccess file to see whether .htaccess is allowedheader('Location: '.$_SERVER['PHP_SELF'] .'?checked=true');//execute the script again to see if the htaccess test worked}else{$modcgi=in_array('mod_cgi',apache...
The field under validation must be present in the input data and not empty. A field is considered "empty" if one of the following conditions are true:The value is null. The value is an empty string. The value is an empty array or empty Countable object. The value is an uploaded file...