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POForm field length validation in phpmailer
 

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  1. POForm field length validation in phpmailer
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    <p>I want to validate form fields by minimum and maximum length.</p> <p>I'm already validating if if they're empty or if the email address is invalid. I want to add additional length requirements to each field (min. length and max. length). What would be best practice for this?</p> <p>excerpt from my <code>process.php</code> file:</p> <pre><code>require_once('includes/phpmailer-config.php'); require_once('includes/phpmailer/class.phpmailer.php'); // other stuff here // Validate each form field if (empty($name)) { $errors['name'] = MIA_NAME; // Error message for missing name } if (empty($email)) { $errors['email'] = MIA_ADDR; // Error message for missing email address } elseif (!(filter_var($email, FILTER_VALIDATE_EMAIL))) { $errors['email'] = INV_ADDR; // Error message for invalid email address } if (empty($message)) { $errors['message'] = MIA_MESG; // Error message for missing message } </code></pre> <p>excerpt from my <code>phpmailer-config.php</code> file:</p> <pre><code>// other stuff here define ('MIA_NAME', 'A Full Name is Required.'); // Error for missing name define ('LG_NAME', {5,50}'); // Min. length: 5, Max. length: 50 define ('TS_NAME', 'Name is too Short.'); // Error for name too short define ('TL_NAME', 'Name is too Long.'); // Error for name too long define ('MIA_ADDR', 'An Email Address is Required.'); // Error for missing email address define ('LG_ADDR', {8,50}'); // Min. length: 8, Max. length: 50 define ('TS_ADDR', 'Email Address is too Short.'); // Error for email too short define ('TL_ADDR', 'Email Address is too Long.'); // Error for email too long define ('INV_ADDR', 'We need a valid email address.'); // Error for invalid email address define ('MIA_MESG', 'A Message is Required.'); // Error message for missing message define ('LG_MESG', {20,7500}'); // Min. length: 20, Max. length: 7500 define ('TS_MESG', 'Message is too Short.'); // Error for message too short define ('TL_MESG', 'Message is too Long.'); // Error for message too long </code></pre> <p><hr> <br/><br/><br/><br/></p> <p><strong>Edit:</strong> Here's what I ended up using, thanks to Amal's answer:</p> <p>Excerpt from <code>phpmailer-config.php</code>:</p> <pre><code>define ('MIA_NAME', 'A Full Name is Required.'); // Error for missing name define ('MIN_NAME', 5); // Min. length for name define ('MAX_NAME', 50); // Max. length for name define ('TS_NAME', 'Name is too Short.'); // Error for name too short define ('TL_NAME', 'Name is too Long.'); // Error for name too long define ('MIA_ADDR', 'An Email Address is Required.'); // Error for missing email address define ('MIN_ADDR', 8); // Min. length for email address define ('MAX_ADDR', 50); // Max. length for email address define ('TS_ADDR', 'Email Address is too Short.'); // Error for email too short define ('TL_ADDR', 'Email Address is too Long.'); // Error for email too long define ('INV_ADDR', 'We need a valid email address.'); // Error for invalid email address define ('MIA_MESG', 'A Message is Required.'); // Error message for missing message define ('MIN_MESG', 20); // Min. length for message define ('MAX_MESG', 7500); // Max. length for message define ('TS_MESG', 'Message is too Short.'); // Error for message too short define ('TL_MESG', 'Message is too Long.'); // Error for message too long </code></pre> <p>Excerpt from <code>process.php</code>:</p> <pre><code>// Validate each form field if (empty($name)) { $errors['name'] = MIA_NAME; } // Missing name elseif (strlen(trim($_POST['name'])) &lt; MIN_NAME ) { $errors['name'] = TS_NAME; } // Name too short elseif (strlen(trim($_POST['name'])) &gt; MAX_NAME ) { $errors['name'] = TL_NAME; } // Name too long if (empty($email)) { $errors['email'] = MIA_ADDR; } // Missing email address elseif (strlen(trim($_POST['email'])) &lt; MIN_ADDR ) { $errors['email'] = TS_ADDR; } // Email too short elseif (strlen(trim($_POST['email'])) &gt; MAX_ADDR ) { $errors['email'] = TL_ADDR; } // Email too long elseif (!(filter_var($email, FILTER_VALIDATE_EMAIL))) { $errors['email'] = INV_ADDR; } // Invalid email address if (empty($message)) { $errors['message'] = MIA_MESG; } // Missing message elseif (strlen(trim($_POST['message'])) &lt; MIN_MESG ) { $errors['message'] = TS_MESG; } // Message too short elseif (strlen(trim($_POST['message'])) &gt; MAX_MESG ) { $errors['message'] = TL_MESG; } // Message too long </code></pre>
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