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PHP Tutorials - Using isset($_REQUEST('name'))
By: FYICenter.com
(Continued from previous topic...)
How To Avoid the Undefined Index Error?
If you don't want your PHP page to give out errors as shown in the previous exercise,
you should consider checking all expected input fields in $_REQUEST with the isset() function
as shown in the example script below:
<?php
if (isset($_REQUEST['name'])) {
$name = $_REQUEST['name'];
} else {
$name = "";
}
if (isset($_REQUEST['comment'])) {
$comment = $_REQUEST['comment'];
} else {
$comment = "";
}
print("<html><pre>");
print("You have submitted the following information:\n");
print(" Name = $name\n");
print(" Comments = $comment\n");
print("Thank you!\n");
print("</pre></html>\n");
?>
(Continued on next topic...)
- How To Create a Web Form?
- What Are Form Input HTML Tags?
- How To Generate a Form?
- Where Is the Submitted Form Data Stored?
- How To Retrieve the Submitted Form Data?
- What Happens If an Expected Input Field Was Not Submitted?
- How To Avoid the Undefined Index Error?
- How To List All Values of Submitted Fields?
- What Are Input Values of SELECT Tags?
- How To Specify Input Values for Radio Buttons?
- How To Specify Input Values for Checkboxes?
- How To Retrieve Input Values for Checkboxes Properly?
- How To Supply Default Values for Text Fields?
- How To Remove Slashes on Submitted Input Values?
- How To Support Multiple Submit Buttons?
- How To Support Hidden Form Fields?
- How To Generate and Process a Form with the Same Script?
- How To Submit Values without Using a Form?
- How To Retrieve the Original Query String?
- How To Protect Special Characters in Query String?
- How To Support Multiple-Page Forms?
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