guitarrgirl Posted September 28, 2007 Share Posted September 28, 2007 I need to figure out how to use this function. I was given a problem where I have two columns of information that a user can enter into a form field. The first column is for text and the second is for only numbers. I need to create a validation so that when a user enters information into the form, then hits the submit button, the code should generate an error message if a number was not entered indicating '"characters entered" is not a number.' here is the code I have so far: <html> <head> <title>My Bills</title> </head> <body style="font-family: Arial, Helvetica, sans-serif; color: #000000;"> <h1>My Bills</h1> <form method=post> <table> <tr> <th>Item</th> <th>Amount</th> </tr> <?php // Here is the Item code for ($i = 1; $i < 5; $i++) { $item_name = 'item'."$i"; $item_value = $_POST[$item_name]; $amount_name = 'amount'."$i"; $amount_value = $_POST[$amount_name]; print '<tr>'; print "<td><input type=text name=$item_name value='$item_value'></td>\n"; print "<td><input type=text name=$amount_name value='$amount_value'></td>\n"; ------- The validation code need to go here, but I don't have a clue on how to use the function. Any help would be greatly appreciated. Email me offline... that is best...I'll get the message that way! Thanks in advance, m Quote Link to comment Share on other sites More sharing options...
pocobueno1388 Posted September 28, 2007 Share Posted September 28, 2007 <?php if (is_numeric($var)){ echo "The value is numeric."; } else { echo "ERROR: The value you entered is not numeric!"; } ?> Quote Link to comment Share on other sites More sharing options...
php_joe Posted September 30, 2007 Share Posted September 30, 2007 To take it one step further you could strip out any non-numerical characters in case there was a typo: <?php $letters = preg_split('//', $var, -1, PREG_SPLIT_NO_EMPTY); foreach($letters as $key => $letter) if(!is_numeric($letter) && $letter != '.') unset($letters[$key); if($letters) $checked_var = implode("", $letters); if (is_numeric($checked_var)){ echo "The value is numeric."; } else { echo "ERROR: The value you entered is not numeric!"; } ?> Quote Link to comment Share on other sites More sharing options...
Daniel0 Posted September 30, 2007 Share Posted September 30, 2007 To take it one step further you could strip out any non-numerical characters in case there was a typo: <?php $letters = preg_split('//', $var, -1, PREG_SPLIT_NO_EMPTY); foreach($letters as $key => $letter) if(!is_numeric($letter) && $letter != '.') unset($letters[$key); if($letters) $checked_var = implode("", $letters); if (is_numeric($checked_var)){ echo "The value is numeric."; } else { echo "ERROR: The value you entered is not numeric!"; } ?> <?php $var = preg_replace('/[^0-9]/', '', $var); ?> Would be an easier way to remove all non-numeric characters from a string. Quote Link to comment Share on other sites More sharing options...
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