Question

Is there a way that I can convert these strings into HTML tags and vice versa?

example:

$str = 'The^ff0000 quick brown^000000 fox jumps over the lazy dog.'

the output must be

The<span style="color:#ff0000;"> quick brown</span> fox jumps over the lazy dog.

something like that and vice versa

Answer 1

If you are only talking about a few specific codes, you could use:

$str = "The^ff0000 quick brown^000000 fox jumps over the lazy dog.";
$str = str_replace('^ff0000', '<span style="color:#ff0000;">', $str);
$str = str_replace('^000000', '</span>', $str);

or if you prefer:

$str = "The^ff0000 quick brown^000000 fox jumps over the lazy dog.";
$str = str_replace(array('^ff0000', '^000000'), array('<span style="color:#ff0000;">', '</span>'), $str);

If you wish to allow any number of color codes, you might do:

$str = str_replace('^000000', '</span>', $str);
$str = preg_replace('@\^([a-f\d]{6})@i', '<span style="color:#$1;">', $str);

For a conversion back (if you are not using any other </span>‘s), it could be:

$str = str_replace('</span>', '^000000', $str);
$str = preg_replace('@<span style="color:#([a-fA-F\d]{6});">@', '^$1', $str);

Note that this assumes you are typing the <span> exactly as above, without variability in whitespace.