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POPHP Make a simple if-isset-empty function
 

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  1. POPHP Make a simple if-isset-empty function
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    <p>I'm coding a worksheet app for a printer company. I'm getting flood of forms. For every single input field I have to check if the <code>$_POST</code> variables are set, and if, so echo back the value. (In case of some error, for example after a validation error, the user shouldn't retype the whole form)</p> <p>Sample code:</p> <pre><code>if(isset($_POST['time'])&amp;&amp;!empty($_POST['time'])){echo $_POST['time'];} </code></pre> <p>I had to implement this about a hundred times. So I tried to figure out some kind of function to make this simple and readable.</p> <p>Something like this:</p> <pre><code>function if_post_echo($key, $default = "") { if(isset($_POST[$key])&amp;&amp;!empty($_POST[$key])){ echo $_POST[$key]; }else{ echo $default; } } </code></pre> <p>But this wont work. I have tried to pass in the <code>$_POST</code> for the <code>$key</code> variable like this:</p> <pre><code>if_post_echo($_POST['time']) function if_request_echo($key, $default = "") { if(isset($key)&amp;&amp;!empty($key)){ echo $key; }else{ echo $default; } } </code></pre> <p>And I also tried this:</p> <pre><code>function if_request_echo($key, $default = null) { return isset($_REQUEST[$key])&amp;&amp;!empty($_REQUEST[$key]) ? $_REQUEST[$key] : $default; } </code></pre> <p>Without any reasonable outcome.</p> <h3>The question:</h3> <p>How can I forge a function that looks for the necessary <code>$_POST</code> variable and returns it or if its unset then returns an empty string. And is there a way to do this for <code>$_GET</code> and <code>$_REQUEST</code>, too? (Or simply duplicate?)</p>
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    1. COMost of the time, you should avoid $_REQUEST, security matter. Go with $_GET and $_POST depending on the sent data.
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    2. COThank you for your comments! @David: I know about the $_REQUEST issue, but this time we are behind protection, the app un availabe from the net. @netcoder: I cant remember why I set this up like this, but I know I used to try the !empty alone without the isset and that dropped some problems.
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    3. CO@David how is `$_REQUEST` any less secure than `$_GET` or `$_POST`? They can all be modified by the user to produce values your application might not expect. As can `$_COOKIE` for that matter, which `$_REQUEST` also gets its value from.
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