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process_if_statements()

Description

Process a string (mainly HTML) which contains if statement placeholders and return the processed string

Handles [%if var is set%] [%endif%] type of placeholders

placeholders found in the HTML template

Parameters

ColumnTypeDefaultDescription
$original_string string Full string containing placeholders
$bind_params array A map of all the values that are meant to replace any

Return

string

Location

include/pdf_functions.php lines 296 to 351

Definition

 
function process_if_statements($original_string, array $bind_params)
    {
    $remove_placeholder_elements = array('[%if ', ' is set%]');

    preg_match_all('/\[%if (.*?) is set%\]/', $original_string, $if_isset_matches);
    foreach($if_isset_matches[0] as $if_isset_match)
        {
        $var_name = str_replace($remove_placeholder_elements, '', $if_isset_match);

        $if_isset_match_position = strpos($original_string, $if_isset_match);
        $endif_position          = strpos($original_string, '[%endif%]', $if_isset_match_position);
        $substr_lenght           = $endif_position - $if_isset_match_position;

        $substr_html_one   = substr($original_string, 0, $if_isset_match_position);
        $substr_html_two   = substr($original_string, $if_isset_match_position, $substr_lenght + 9);
        $substr_html_three = substr($original_string, $endif_position + 9);

        /*
        Make sure we have the correct subset (html2) for our if statement. This means we don't
        stop at the first endif we found unless there are no if statements inside the subset.
        If there are, move passed it and continue looking for other endifs until we reach the
        same number of endifs as we had ifs
        */
        $endif_count = 0;
        do
            {
            $if_count = preg_match_all('/\[%if (.*?) is set%\]/', $substr_html_two, $if_isset_matches_subset_two) - 1;
            if(0 < $if_count)
                {
                // Move the end of the second subset of HTML to the next endif and then increase endif counter
                $next_endif_position = strpos($substr_html_three, '[%endif%]') + 9;
                $substr_html_two    .= substr($substr_html_three, 0, $next_endif_position);
                $substr_html_three   = substr($substr_html_three, $next_endif_position);

                $endif_count++;
                }
            }
        while($if_count !== $endif_count);

        // Variable is not set, remove that section from the template
        if(!array_key_exists($var_name, $bind_params))
            {
            $original_string = $substr_html_one . $substr_html_three;

            continue;
            }

        // The section stays in, clean it up of the top level if - endif placeholders
        $substr_html_two = substr($substr_html_two, strlen($if_isset_match));
        $substr_html_two = substr($substr_html_two, 0, -9);

        $original_string = $substr_html_one . $substr_html_two . $substr_html_three;
        }

    return $original_string;
    }

This article was last updated 4th December 2024 08:35 Europe/London time based on the source file dated 27th November 2024 15:30 Europe/London time.