if(is_string($a)){ echo "0 is string;"; }else{ echo "0 is not string;"; } if(!$a){ echo "0 is false;"; }else{ echo "0 is not false;"; } // 判断 '' 和 0、null、empty、false 之间的关系 $a = ''; echo "'' 和 0、empty、null、false 之间的关系:"; if($a == ...
发现empty有点可疑。因为之前是做java 的,php不太熟,所以就去查了一下。 原来php中empty过滤掉空字符串的同时对0也会进行过滤。 接下来简单做个比对~ Java 代码: 1publicstaticvoidmain(String[] args) {23String a = "";4String b =null;5String c =newString();6Kong(a, "a");7Kong(b, "b")...
The PHP empty() function used to check whether the string is empty or not. In PHP the empty() function return true if the variable has empty or zero value and it return false if string has non-empty or non-zero value. PHP empty() function syntax: empty(“string”); PHP example of...
fastcgi_paramQUERY_STRING$query_string;fastcgi_paramREQUEST_METHOD$request_method;fastcgi_paramCONTENT_TYPE$content_type;fastcgi_paramCONTENT_LENGTH$content_length;fastcgi_paramSCRIPT_NAME$fastcgi_script_name;fastcgi_paramREQUEST_URI$request_uri;fastcgi_paramDOCUMENT_URI$document_uri;fastcgi_paramDOCUMENT_ROOT...
ThinkPHP 是一个免费开源的,快速、简单的面向对象的 轻量级PHP开发框架 ,遵循Apache2开源协议发布,是为了敏捷WEB应用开发和简化企业应用开发而诞生的。ThinkPHP从诞生以来一直秉承简洁实用的设计原则,在保持出色的性能和至简的代码的同时,也注重易用性。并且拥有众多的
use Illuminate\Support\Arr; $string = 'Laravel'; $array = Arr::wrap($string); // ['Laravel']If the given value is null, an empty array will be returned:use Illuminate\Support\Arr; $array = Arr::wrap(null); // []data_fill()...
string(35) "/7e5c9b7b04a66e52a084ded39a239b63/e" */ 以此类推,将所有不可见字符全都给替换回来之后,整个文件的代码就会变成如下所示,阅读起来非常简单。 function func0($var1,$var2="") { if(empty($var2)) { return base64_decode($var1); ...
classUserExceptionextendsException{publicstaticfunctionforEmptyEmail():self{returnnewself("User's email must not be empty");}publicstaticfunctionforInvalidEmail(string $email):self{returnnewself(sprintf('%s is not a valid email address',$email));}publicstaticfunctionforNonexistentUser(string $userId...
·$tsql– This required parameter is a string that defines a Transact-SQL query. Question marks (?) are used as placeholders for parameters. ·$params– This optional parameter is an array of values that correspond (in order) to the parameter placeholders (question marks) in the query define...
phpclassD1no{}@unlink("phar.phar");$phar=newPhar("phar.phar");//后缀名必须为phar$phar->startBuffering();$phar->setStub("<?php __HALT_COMPILER(); ?>");//设置stub$o=newD1no();$phar->setMetadata($o);//将自定义的meta-data存入manifest$phar->addFromString("test.txt","test");/...