Fields

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// Check if a field exists and is not empty
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$user = [
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  'id' => 1,
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  'name' => 'John Doe',
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  'email' => 'john@example.com',
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  'phone' => '',
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  'bio' => null
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];
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// Check if email exists and is not empty
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$email = cbo_check_field($user, 'email');
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if ($email) {
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  echo "Email: $email";
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} else {
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  echo "Email not provided";
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}
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// Check if phone exists and is not empty
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$phone = cbo_check_field($user, 'phone');
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if ($phone) {
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  echo "Phone: $phone";
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} else {
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  echo "Phone not provided";
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}
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// Check if bio exists and is not empty
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$bio = cbo_check_field($user, 'bio');
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if ($bio) {
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  echo "Bio: $bio";
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} else {
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  echo "Bio not provided";
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}

1
// Validate a form submission
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function validate_contact_form($form_data) {
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  $errors = [];
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  // Check required fields
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  if (!cbo_check_field($form_data, 'name')) {
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    $errors['name'] = 'Name is required';
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  }
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  if (!cbo_check_field($form_data, 'email')) {
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    $errors['email'] = 'Email is required';
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  } elseif (!filter_var($form_data['email'], FILTER_VALIDATE_EMAIL)) {
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    $errors['email'] = 'Please enter a valid email address';
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  }
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  if (!cbo_check_field($form_data, 'message')) {
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    $errors['message'] = 'Message is required';
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  }
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  return $errors;
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}
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// Usage
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$form_data = [
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  'name' => 'John Doe',
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  'email' => 'invalid-email',
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  'message' => ''
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];
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$validation_errors = validate_contact_form($form_data);
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if (empty($validation_errors)) {
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  echo 'Form is valid, processing submission...';
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  // Process form submission
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} else {
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  echo 'Please correct the following errors:<br>';
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  foreach ($validation_errors as $field => $error) {
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    echo "- $error<br>";
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  }
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}

1
// Display ACF fields only if they exist and are not empty
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$fields = get_fields('post_123');
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// Display title if it exists
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$title = cbo_check_field($fields, 'custom_title');
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if ($title) {
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  echo '<h1>' . $title . '</h1>';
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} else {
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  echo '<h1>' . get_the_title() . '</h1>';
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}
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// Display subtitle if it exists
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$subtitle = cbo_check_field($fields, 'subtitle');
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if ($subtitle) {
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  echo '<h2>' . $subtitle . '</h2>';
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}
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// Display featured image if it exists
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$image = cbo_check_field($fields, 'featured_image');
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if ($image) {
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  echo '<img src="' . $image['url'] . '" alt="' . $image['alt'] . '">';
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}