note 44606 deleted from function.substr by danbrown

Note Submitter: fox at conskript dot server ---- Here's a little bit of code to chop strings (with html tags) around a specified length while making sure no html tags are chopped. It also prevents chopping while a tag is still open. Note: this will only work in xhtml strict/transitional due to the checking of "/>" tags and the requirement of quotations in every value of a tag. It's also only been tested with the presence of br, img, and a tags, but it should work with the presence of any tag. <?php function html_substr($posttext, $minimum_length, $length_offset) { // The approximate length you want the concatenated text to be $minimum_length = 200; // The variation in how long the text can be // in this example text length will be between 200-10=190 characters // and the character where the last tag ends $length_offset = 10; // Reset tag counter & quote checker $tag_counter = 0; $quotes_on = FALSE; // Check if the text is too long if (strlen($posttext) > $minimum_length) { // Reset the tag_counter and pass through (part of) the entire text for ($i = 0; $i < strlen($posttext); $i++) { // Load the current character and the next one // if the string has not arrived at the last character $current_char = substr($posttext,$i,1); if ($i < strlen($posttext) - 1) { $next_char = substr($posttext,$i + 1,1); } else { $next_char = ""; } // First check if quotes are on if (!$quotes_on) { // Check if it's a tag // On a "<" add 3 if it's an opening tag (like <a href...) // or add only 1 if it's an ending tag (like </a>) if ($current_char == "<") { if ($next_char == "/") { $tag_counter++; } else { $tag_counter = $tag_counter + 3; } } // Slash signifies an ending (like </a> or ... />) // substract 2 if ($current_char == "/") $tag_counter = $tag_counter - 2; // On a ">" substract 1 if ($current_char == ">") $tag_counter--; // If quotes are encountered, start ignoring the tags // (for directory slashes) if ($current_char == "\"") $quotes_on = TRUE; } else { // IF quotes are encountered again, turn it back off if ($current_char == "\"") $quotes_on = FALSE; } // Check if the counter has reached the minimum length yet, // then wait for the tag_counter to become 0, and chop the string there if ($i > $minimum_length - $length_offset && $tag_counter == 0) { $posttext = substr($posttext,0,$i + 1) . "..."; return $posttext; } } } return $posttext; }