isset

相关标签：javascript jquery android 多少钱 iPhone

PHP: Check if variable exist but also if has a value equal to something

I have (or not) a variable $_GET[\'myvar\'] coming from my qu开发者_StackOverflow社区ery string and I want to check if this variable exists and also if the value corresponds to something inside my if[详细]

2023-01-21 07:51 分类：问答
Passing parameters back to same form using PHP

I am trying to simply set a开发者_开发技巧 variable and have it passed back to the same PHP script as called, however it doesn\'t work.[详细]

2023-01-18 03:29 分类：问答
Check if value isset and null

I need to check if value is defined as anythin开发者_如何学Gog, including null. isset treats null values as undefined and returns false. Take the following as an example:[详细]

2023-01-17 23:01 分类：问答
what is slower or what is faster in PHP: if( @$myvar['test'] === null ) or if( !isset( $myvar['test'] ))

I wonder what is slower or faster: if( @$myvar[\'test\'] === null ) { .. } or: if( !isset( $myvar[\'test\'] )) { .. }[详细]

2023-01-15 17:18 分类：问答
Check if the variable passed as an argument is set

I want to check if a variable called $smth is blank (I mean empty space), and I also want to check if开发者_如何转开发 it is set using the function I defined below:[详细]

2023-01-12 12:53 分类：问答
PHP object isset and/or empty

Is there a way to check if an object has any fields?For example, I have a soap server I am querying using a soap client and if I call a get method, I am either returned an object containing fields def[详细]

2023-01-10 19:19 分类：问答
Test if session is started

How do you test to see if sessions are on. This is not the way... session_start(); if(isset($_SESSION)开发者_JAVA百科) {[详细]

2023-01-09 13:01 分类：问答
isset code not being executed PHP

I was wondering if my code below is even correct, I\'ve been having numerous errors with this, but am not sure if the problem really exists here. The code is below:[详细]

2023-01-08 06:16 分类：问答
Looking for variables which aren't assigned

What could happen if my template looks for variables which weren\'t assigned? For example: var id = \'{$tpl_id}\';[详细]

2022-12-28 01:06 分类：问答
Using php's magic function inside another function does not work

I want to use magic function __set() and __get() for storing SQL data inside a php5 class and I get some strange issue using them inside a function:[详细]

2022-12-27 04:48 分类：问答