Newbe PHP: I'm haveing trouble running simple example code

2018-06-02 18:39:11

I'm trying to get some PHP example code to work on PHP version 5.3.4, Apache 2.2.17 on Windows.

The example says I need PHP 4.0 and above with CURL and contains:

<? 
$function = $_GET['function-if-exist'];
$test = "Test";
?>

<? =$test ?>

I don't understand why I'm getting the following errors:

My PHP doesn't understand <? and wants <?PHP instead.

My PHP doesn't like <? =$test ?> and wants something like <?PHP echo $test ?>

$function = $_GET['function-if-exist']; causes the error "Undefined index" but presumably works for the folks that developed it.

Can anyone help me understand why their code is not working for me?

1) <? is the "short tag". Most servers are configured to not allow short tags. This can be changed in php.ini .

2) Again, short tags. Also I think you can't have a space before the = , but the main problem is the short tags setting.

3) $_GET accesses the query string, so when loading your script you need myscript.php?function-if-exist=something

在继续防止错误被抛出之前检查参数是否被设置是比较理想的，例如

if(isset($_GET['function-if-exist']))
{
    $functionexists = $_GET['function-if-exist'];
}

the short tag notation is disabled in your php.ini

you need to remove the space before your equal sign

your _get array contains not the expected index, what url do you enter to access the page?

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