Validation Patterns
Required Fields
Check whether a required text value is present.
Required Fields
required_field.php
<?php
$name = ;
$trimmed = trim($name);
$status = $trimmed === "" ? "missing" : "ok";
echo "name=" . $name . "\n";
echo "status=" . $status . "\n";
<?php
$name = ;
$trimmed = trim($name);
$status = $trimmed === "" ? "missing" : "ok";
echo "name=" . $name . "\n";
echo "status=" . $status . "\n";
<?php
$name = ;
$trimmed = trim($name);
$status = $trimmed === "" ? "missing" : "ok";
echo "name=" . $name . "\n";
echo "status=" . $status . "\n";
required-field
Validation often starts by trimming input and checking that the required value is not empty.