PHP: Split string into array based on length then delimiter

Question

I'm trying to split a SMS message if it hits the limit of 160 characters.

This is my current code.

    $messageparts = str_split($message, 160);
    foreach($messageparts as $parts){
    sms($numbers, $parts);
    }

My current problem

My SMS message includes "\n" but when i use strlen, it only counts "\n" as 1 character while the SMS server count "\n" as 2 characters.
Currently it will split the SMS message when it hits the limit of 160 characters which is quite ugly. Example being:

SMS 1
Item A $160
Item B $170
Ite

SMS 2
m C $180

As you can see from the example, its quite a bad split. I'm looking for someone who can help so that the function can first split by character limits then delimit by the last "\n". So that it will be as the following example.

SMS 1
Item A $160
Item B $170

SMS 2
Item C $180

Akshat Singhal · Accepted Answer · 2014-02-15 16:31:27Z

1

Use the following code :

$array = explode("\n",$message);
$messages = array();
$i = 0;
$newLineCharacterCount = 0;
foreach ($array as $message) {
    if ((str_len($messages[$i]) + str_len($message) + $newLineCharacterCount) <= 160) {
        $messages[$i] = $messages[$i].message;
        $newLineCharacterCount++;
    }
    else {
        $i++;
        $newLineCharacterCount = 0;
        if (str_len($message) > 160) {
            $tempMessages = str_split($message,160);
            foreach ($tempMessages as tempMessagePart) {
                $messages[$i] = tempMessagePart;
                $i++;
            }
        }
        else
            $messages[$i] = $message;
    }
}

edited Feb 15, 2014 at 16:31

answered Feb 15, 2014 at 5:49

Akshat Singhal

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2 Comments

Damian Sia Over a year ago

Thanks! Your code is buggy but I've build something based on your example!

Akshat Singhal Over a year ago

@DamianSia Please add the corrected code for future references. People may not read your comment and use the code directly.

Krayton · Accepted Answer · 2014-02-15 05:49:16Z

0

First split messages by lines like that:

$messageParts = array();
$messageLines = explode("\n", $message);

foreach ($messageLines as $line) {
   foreach (str_split($message, 160) as $part) {
       $messageParts[] = $part;
   }
}

If you want to split by "." or "," you cn use preg_split function. For example:

$keywords = preg_split("/[\.,]+/", "hypertext. language, programming");

Hope it helps.

answered Feb 15, 2014 at 5:49

Krayton

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