修剪一个字符串并添加到它的末尾[重复]

Question

This question already has an answer here:

• How to capture complete words using substr() in PHP, limit by word? 7 answers

what i am trying to do is basically shorten down a peice of text and add "..." to the end if the text is too long. However (here is where it gets hairy) i only want to apply this, if the last character of the string was a SPACE. If it is NOT space, then i want to go through the string (Backwords) until i find a space, THEN when a space is found i will add "..." to it.

The reasoning to this is i dont want to add "..." to a word when its not finished, such as "wor..." i would rather it be "word...".

Here is what i have tried so far (NOTE: $row_object_title is just a string coming from a database, so its safe to assume that its just a random text):

if (strlen($row_object_title) > 50){
    // check for spaces
        $short = substr($row_object_title,50);

        $chr = substr($short,-1);
        $ascii = ord($chr);
        if ($ascii == "32"){
            $row_object_title .= "...";
        }else{  
            $x = 49;
            while($ascii !== "32"){
                $chr = substr($short,$x);
                $ascii = ord($chr);
                if ($ascii == "32"){
                    // we got a space!
                    $row_object_title .= "...";
                }
                $x = $x - 1;                        
            }

        }
}

Thanks for the help

UPDATE:

if (strlen($row_object_title) > 50){
    // check for spaces
        $short = substr($row_object_title,50);

        $chr = substr($short,-1);
        $ascii = ord($chr);
        if ($ascii == "32"){
            //$trim = "...";
            //$final = str_replace($short,$trim,$row_object_title);
            $row_object_title .= "...";
        }else{  
            $x = 49;
            while($ascii != "32"){
                $chr = substr($short,$x,1);
                $ascii = ord($chr);
                if ($ascii == "32"){
                    // we got a space!
                    $row_object_title .= "...";
                }
                $x = $x - 1;                        
            }

        }
}

SECOND UPDATE: Every one is posting their version of the script (thanks alot) but could you guys possibly try to fix mine instead of posting other ways of doing it?

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Answer 1

$text = "This should just fit in! But if we make it longer, it won't ";
if (strlen($text) > 50) {
    $text = substr($text, 0, 50);
    for ($i = strlen($text) - 1; $i > 0; $i--) {
        if ($text[$i] === ' ' || $text[$i] === ',' || $text[$i] === '.' || $text[$i] === '!' || $text[$i] === '?') {
            $text = substr($text, 0, $i) . '... <b>Read More</b>';
            break;
        }
    }
}

Does the job for me (should add RegEx, but I'm not that great with those...).