为什么我的 Contact Form 7 字段验证也禁止空条目？

Question

我在 functions.php 中为两个字段添加了验证。这些验证该字段只能采用 letters/numbers 并且没有特殊字符。它工作正常，但不幸的是字段 'tussenvoegsel' 不能留空，这也需要是可能的。

// VALIDATIE INPUT FIELDS (GEEN CIJFERS MOGELIJK ALS INPUT)
add_filter( 'wpcf7_validate_text', 'alphanumeric_validation_filter', 20, 2 );
add_filter( 'wpcf7_validate_text*', 'alphanumeric_validation_filter', 20, 2 );

function alphanumeric_validation_filter( $result, $tag ) {
    $tag = new WPCF7_Shortcode( $tag );
    
    if ( 'familienaam' == $tag->name ) {
        $name_of_the_input = isset( $_POST['familienaam'] ) ? trim( $_POST['familienaam'] ) : '';
        
        if ( !preg_match('/^[a-zA-Z0-9]+$/',$name_of_the_input) ) {
            $result->invalidate( $tag, "Alleen letters zijn toegestaan." );
        }
    }
    
    if ( 'tussenvoegsel' == $tag->name ) {
        $name_of_the_input = isset( $_POST['tussenvoegsel'] ) ? trim( $_POST['tussenvoegsel'] ) : '';
        
        if ( !preg_match('/^[a-zA-Z0-9]+$/',$name_of_the_input) ) {
            $result->invalidate( $tag, "Alleen letters zijn toegestaan." );
        }
    }
    
    return $result;
}

这很奇怪，因为 'tussenvoegsel' 的插件中的条目没有 *。我可以添加什么来保持 'tussenvoegel' 条目仍然是可选的，即使我也需要验证。

[text tussenvoegsel placeholder "voorvoegsel"]
[text* familienaam placeholder "Achternaam"]

Answer 1

此处使用官方文档进行自定义验证https://contactform7.com/2015/03/28/custom-validation/

add_filter( 'wpcf7_validate_text', 'alphanumeric_validation_filter', 20, 2 );
add_filter( 'wpcf7_validate_text*', 'alphanumeric_validation_filter', 20, 2 );
    
function alphanumeric_validation_filter( $result, $tag ) {
    
        if ( 'familienaam' == $tag->name ) {
         $familienaam= isset( $_POST['familienaam'] ) ? trim( $_POST['familienaam'] ) : '';
        
            if ( !ctype_alnum( $familienaam) ) {
               $result->invalidate( $tag, "Alleen letters zijn toegestaan." );
            }
        }
        
        if ( 'tussenvoegsel' == $tag->name ) {
            $tussenvoegsel = isset( $_POST['tussenvoegsel'] ) ? trim( $_POST['tussenvoegsel'] ) : '';
        
             if ( !ctype_alnum( $tussenvoegsel ) ) {
                $result->invalidate( $tag, "Alleen letters zijn toegestaan." );
             }
         }
    
    return $result;
}

Answer 2

在您的函数中，您正在验证 CF7 字段，但没有检查该字段是否为必需字段。在这种情况下，它将始终运行您的功能通过验证过滤器，并且无论是否需要该字段都要求输入是字母数字。

add_filter( 'wpcf7_validate_text', 'alphanumeric_validation_filter', 20, 2 );
add_filter( 'wpcf7_validate_text*', 'alphanumeric_validation_filter', 20, 2 );

function alphanumeric_validation_filter( $result, $tag ) {
    $tag = new WPCF7_Shortcode( $tag );

    if ( 'familienaam' === $tag->name ) {
        $name_of_the_input = isset( $_POST['familienaam'] ) ? trim( $_POST['familienaam'] ) : '';
        // Check if the field is empty or required.
        if ( ! empty( $name_of_the_input ) || $tag->is_required() ) {
            if ( !preg_match('/^[a-zA-Z0-9]+$/', $name_of_the_input ) ) {
                $result->invalidate( $tag, 'Alleen letters zijn toegestaan.' );
            }
        }
    }
    
    if ( 'tussenvoegsel' === $tag->name ) {
        $name_of_the_input = isset( $_POST['tussenvoegsel'] ) ? trim( $_POST['tussenvoegsel'] ) : '';
        // Check if the field is empty or required.
        if ( ! empty( $name_of_the_input ) || $tag->is_required() ) {
            if ( ! preg_match( '/^[a-zA-Z0-9]+$/', $name_of_the_input ) ) {
                $result->invalidate( $tag, 'Alleen letters zijn toegestaan.' );
            }
        }
    }
    
    return $result;
}

为什么我的 Contact Form 7 字段验证也禁止空条目？

Why is my Contact Form 7 field validation prohibiting empty entries too?

wordpress

validation

plugins

contact-form-7