CF7 get placeholder text from php-CodePudding

When using CF7 (Contact Form 7) is there any way to get the placeholder text from a php function?
I’ve tried using a shortcode to call the php function, but it doesn’t work.
Here is my test:

function.php code:

add_filter( 'wpcf7_form_elements', 'do_shortcode' );
add_shortcode( 'get_placeholder', 'get_placeholder_func' );
function get_placeholder_func () {
    return "Hello world";
}

CF7 template:

[get_placeholder]
[text the-field placeholder [get_placeholder]]

First line works fine and outputs the text returned from the php function. Second line doesn't work as it only outputs a end-bracket.

I know I can do it by using js/jQuery, but it is a bit messy.
Can anybody help? Thanks :)

CodePudding user response：

Why don't you try the following:

Define the function

function get_placeholder_func () {
    return "Hello world";
}

Then create your own input for CF7

wpcf7_add_shortcode('custom_text_input', 'wpcf7_custom_text_input');
function wpcf7_custom_text_input($tag) {
    if (!is_array($tag)) return '';

    $name = $tag['name'];
    if (empty($name)) return '';
    $placeholder = get_placeholder_func();

    $html = '<input type="text" name="'.$name.'" placeholder="'.$placeholder.'" />';
    return $html;
}

Then, when editing CF7 you just have to call the input created

[custom_text_input name-of-input]

This shortcode will have name-of-input name and placeholder declared by the function get_placeholder_func()

Hope it works.

CodePudding user response：

I'm a little unclear as to why you would want to do this, but here's a method.

add_filter( 'wpcf7_form_elements', 'cf7_replace_a_string' );
function cf7_replace_a_string( $content ) {
    // Name = Form Tag Name.
    $str_pos = strpos( $content, 'name="the-field"' );
    // If your form field is present.
    if ( false !== $str_pos ) {
        $placeholder = 'this is your placeholder';
        $content     = str_replace( 'placeholder="placeholder"', 'placeholder="' . $placeholder . '"', $content );
    }
    return $content;
}

Then your form tag would look like this:

[text the-field placeholder "placeholder"]