验证文本输入字段，仅接受联系人格式为7的字母

Question

如何在联系表单7 WordPress插件中使用仅接受字母来验证文本输入字段。

谢谢。

Answer 1

https://contactform7.com/2015/03/28/custom-validation/

类似的东西

add_filter( 'wpcf7_validate_text', 'alpha_validation_filter', 20, 2 );
add_filter( 'wpcf7_validate_text*', 'alph_validation_filter', 20, 2 );

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

    if ( 'name-of-the-input' == $tag->name ) {
    $name_of_the_input = isset( $_POST['name-of-the-input'] ) ? trim( $_POST['name-of-the-input'] ) : '';

    if ( !preg_match('/^[a-zA-Z\s]+$/',$name_of_the_input) )
    {
    $result->invalidate( $tag, "Allowed characters are alphanumeric only" );
    }
    }

    return $result;
}

注意：
1。您必须添加在创建字段时添加的输入名称。