Limiting a string to to 256 bytes

Question

I currently have:

$payload = array();
$payload['aps']['badge'] = 1;
$payload['aps']['alert'] = html_entity_decode($title);
$payload['aps']['sound'] = "default";

But:

The maximum size allowed for a notification payload is 256 bytes; Apple Push Notification Service refuses any notification that exceeds this limit.

$title (is mainly english, not many special chars) is quite often larger than 256 chars. What should I do to check and limit/remove extra chars? strlen?

PHP string are kind of char arrays. IIRC a char is 1 byte long, so yeah: check with strlen if the string is larger than 256 chars. — clentfort

BebliucGeorge BebliucGeorge · Accepted Answer · 2012-06-10T13:21:36

You can either check with strlen if the title is bigger than 256, or just cut it. $title = substr($title, 0, 256);

Limiting a string to to 256 bytes

2 Answers