在str_replace中排除html属性

Question

so i'm trying to do the usual replacing each instance of a company name in wordpress, and i've run into an issue where on occasion (usually in the href of links) it's breaking links.

code i'm using (includes a filter for ACF custom fields)

    //Replace the word lunch with a span
function replace_text_wps($text){
    $replace = array(
        // 'WORD TO REPLACE' => 'REPLACE WORD WITH THIS'
        'lunch!' => '<span class="lunch">lunch!</span>',
        'Lunch!' => '<span class="lunch">lunch!</span>',
        'LUNCH!' => '<span class="lunch">lunch!</span>'
    );
    $text = str_replace(array_keys($replace), $replace, $text);
    return $text;
}

add_filter('the_content', 'replace_text_wps');
add_filter('the_excerpt', 'replace_text_wps');
add_filter('the_title', 'replace_text_wps');
add_filter('acf_the_content', 'replace_text_wps');

Is there a way to only replace it outside of stuff like href tags? i've looked into stuff like DOM parses but i'm not sure if there's a simpler method- it doesn't seem to cause grief in any other instances so i'm not sure that pre=processing the entire HMTL and looking for the word is appropriate. I did wonder about searching for the string including a space before and after it, but i wasn't sure how to include leading / trailing spaces, and it felt a bit bodge-y? Thanks in advance! Pete

Answer 1

ok, so in this instance, which is quite specific, i've found the following code works well enough. added trailing / leading spaces in the initial matching parameters, and also variants to find it directly after html tags including with a space. less elegant, but sufficient for the purpose here.

function replace_text_wps($text){
    $replace = array(
        // used mid-line
        ' lunch! ' => ' <span class="lunch">lunch!</span> ',
        ' Lunch! ' => ' <span class="lunch">lunch!</span> ',
        ' LUNCH! ' => ' <span class="lunch">lunch!</span> ',
        // used at end of lines
        ' lunch!' => ' <span class="lunch">lunch!</span>',
        ' Lunch!' => ' <span class="lunch">lunch!</span>',
        ' LUNCH!' => ' <span class="lunch">lunch!</span>',
        // used inside html tags like headers
        '>lunch!' => '><span class="lunch">lunch!</span>',
        '>Lunch!' => '><span class="lunch">lunch!</span>',
        '>LUNCH!' => '><span class="lunch">lunch!</span>',
        //used directly after html tags
        '> lunch!' => '> <span class="lunch">lunch!</span>',
        '> Lunch!' => '> <span class="lunch">lunch!</span>',
        '> LUNCH!' => '> <span class="lunch">lunch!</span>',
        //exclude alt tags on images, title attributes etc
        '"lunch!' => '"lunch!',
        'lunch!"' => 'lunch!"',
        '"Lunch!' => '"lunch!',
        'Lunch!"' => 'lunch!"'
    );
    $text = str_replace(array_keys($replace), $replace, $text);
    return $text;
}
add_filter('the_content', 'replace_text_wps');
add_filter('the_excerpt', 'replace_text_wps');
add_filter('the_title', 'replace_text_wps');
add_filter('acf_the_content', 'replace_text_wps');