public static Unicode::truncateBytes($string, $len)
Truncates a UTF-8-encoded string safely to a number of bytes.
If the end position is in the middle of a UTF-8 sequence, it scans backwards until the beginning of the byte sequence.
Use this function whenever you want to chop off a string at an unsure location. On the other hand, if you're sure that you're splitting on a character boundary (e.g. after using strpos() or similar), you can safely use substr() instead.
Parameters
string $string: The string to truncate.
int $len: An upper limit on the returned string length.
Return value
string The truncated string.
File
- core/lib/Drupal/Component/Utility/Unicode.php, line 259
Class
- Unicode
- Provides Unicode-related conversions and operations.
Namespace
Drupal\Component\Utility
Code
1 2 3 4 5 6 7 8 9 10 11 12 | public static function truncateBytes($string, $len) { if (strlen($string) <= $len) { return $string; } if ((ord($string[$len]) < 0x80) || (ord($string[$len]) >= 0xC0)) { return substr($string, 0, $len); } // Scan backwards to beginning of the byte sequence. while (--$len >= 0 && ord($string[$len]) >= 0x80 && ord($string[$len]) < 0xC0); return substr($string, 0, $len);} |
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