Very simple GET help

[MrCreeky]

I just want to show an area on a page if the GET string is set to true i.e. .php?string=true

<?php 
$string == $_GET
if ($string === "true") {
}
else {
}
?>

That's what I came up with after quickly looking at my book but it errors. Could someone show where where I'm going wrong. This is very simple I'm sure but I don't do much php coding.

[johnathanhebert]

$_GET is an array, with the keys set to the parameter names on the query string, and the values set to the values on the query string... you are also missing the semicolon after your first statement -- so try:

 

$string = $_GET["string"];

 

or just:

 

if ($_GET["string"]==="true")

[MrCreeky]

Using this:

<?php 
$string = $_GET["string"];

if ($string === "true") {
}

else {
}
?>

 

I get an error of: Undefined index: string on line 2

[iPixel]

try this....

$string=  isset($_GET[string]) ? $_GET[string] : null;
if (!is_null($string)) 
{
	$string= $_GET[string];
}

 

This should avoid that error .

[MrCreeky]

Hi, that give this error: Notice: Use of undefined constant string - assumed 'string'

[gevans]

<?php
$foo =  isset($_GET['string']) ? $_GET['string'] : null;
if(!is_null($foo)) {
      echo 'true';
} else {
echo 'false';
}

[iPixel]

MrCreeky... is $string predefined as anything anywhere else above this code?

 

then again maybe $gevans was onto something... dont call the variable "$string" use something else.

[MrCreeky]

<?php
$foo =  isset($_GET['string']) ? $_GET['string'] : null;
if(!is_null($foo)) {
      echo 'true';
} else {
echo 'false';
}

 

Using this works just fine for my page but how would I be able to use html with the echo output without having to comment out parts like this: class=/"none/" ?

[gevans]

You can tkae  alook at the heredoc syntax;

 

http://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc

 

This will allow you to do the following...

 

<?php
$foo =  isset($_GET['string']) ? $_GET['string'] : null;
if(!is_null($foo)) {
echo <<<EOD
<span class="whatever">'single quotes as well'</span>
EOD;
} else {
echo <<<EOD
<span class="whenever">'single quotes as well'</span>
EOD;
}

[MrCreeky]

That would work well for a simple html statement but I have a large form. Is there a different way to do that?

[gevans]

What else do you want?

[Adam]

<?php
$foo =  isset($_GET['string']) ? $_GET['string'] : null;
if(!is_null($foo)) {
   echo <<<EOD

<table width="1000000">
    <tr>
        <td>You could fit a big table in here!</td>
    </tr>
</table>

   EOD;
} else {
   echo <<<EOD
<span class="whenever">'single quotes as well'</span>
EOD;
}

[gevans]

@MrAdam

 

That first EOD; needs the space before it removed.