highlight_phrase()

highlight_phrase($str, $phrase[, $tag_open = ''[, $tag_close = '']])

Will highlight a phrase within a text string. The first parameter will contain the original string, the second will contain the phrase you wish to highlight. The third and fourth parameters will contain the opening/closing HTML tags you would like the phrase wrapped in.

Example:

$string = "Here is a nice text string about nothing in particular.";
echo highlight_phrase($string, "nice text", '<span style="color:#990000;">', '</span>');

The above code prints:

Here is a <span style="color:#990000;">nice text</span> string about nothing in particular.

mark {
        background: #ff0;
        color: #000;
};