$myString = ""; if (empty($myString)) { echo "string is empty"; }else{ echo "string is not empty"; } Output: "string is empty" Similarly, we can also use the strlen() function to check for an empty string in PHP. $myString = ""; if (strlen($myString) == 0) { echo ...
?array $badges ): string {We can safely use loose comparison ==, and empty string '' value will also be treated as not present, which is reasonable in this scenario.$nickname = $nickname == null ? 'Anonymous' : $nickname;Now, what about checking arrays or models for being empty?Chec...
{$check= 0;if(filter_var($url, FILTER_VALIDATE_URL) !==false) {$check= 1; }return$check; } 语法: <?php$url= "http://koonk.com";$check= checkvalidURL($url);echo$check;//if returns 1 then URL is valid.?> 6. 生成二维码 functionqr_code($data,$type= "TXT",$size='150',$...
代码第116行,这里调用的routeCheck()函数就是路由处理函数 if (empty($dispatch)) { $dispatch = self::routeCheck($request, $config); } routeCheck() public static function routeCheck($request, array $config) { $path = $request->path(); //获取路径 $depr = $config['pathinfo_depr']; //...
string 必需。规定要反转的字符串。 */ /** 此函数的作用是反转中文字符串 mb_strlen() 获取字符的长度 mb_substr() 获取字符的单个元素 krsort() 按照键值逆序排序数组,对关联数组按照键名进行降序排序 Array ( [8] => 国 [7] => 中 [6] => h [5] => s [4] => i [3] => l [2] =>...
() functionfunctionstr_starts_with(string$string,string$substring):bool{// get the length of the substring$len=strlen($substring);// just return true when substring is an empty stringif($len==0){returntrue;}// return true or false based on the substring resultreturnsubstr($string,0,$len...
redis-check-aof redis-check-dump redis-cli[root@localhost ~]# /usr/local/redis/bin/redis-cli127.0.0.1:6379> lrange list1(error) ERR wrong number of arguments for 'lrange' command127.0.0.1:6379> lrange list1 0 -11) "wxh"2) "wjn"3) "wr"127.0.0.1:6379> linsert list1 before wr wl...
将uri 里的id=1通过存入QUERY_STRING环境变量。 Web 守护进程 fork 一个子进程,然后在子进程中执行 user 程序,通过环境变量获取到id。 执行完毕之后,将结果通过标准输出返回到子进程。 子进程将结果返回给客户端。 基于PHP语言的Web程序,它的工作机制也类似于CGI的模型,但根据实际的情况,PHP 的具体实现会有些不...
class SplFileObject extends SplFileInfo implements RecursiveIterator, SeekableIterator { /* 常量 */ public const int DROP_NEW_LINE; public const int READ_AHEAD; public const int SKIP_EMPTY; public const int READ_CSV; /* 方法 */ public __construct( string $filename, string $mode = "r", ...
Description: Check the current connection status. Prototype $redis->ping([string $message]); Return value Mixed: This method returns TRUE on success, or the passed string if called with an argument. Example /* When called without an argument, PING returns `TRUE` */ $redis->ping(); /*...