Collections functions
Encryption functions
General functions
Render functions
Theme permission functions
Video functions
Resource functions

seems_utf8()

Description

Looks for particular patterns to attempt to determine if the provided string is in UTF8 format

Parameters

ColumnTypeDefaultDescription
$str string

Return

boolean True if it's possibly UTF8

Location

include/language_functions.php lines 495 to 512

Definition

 
function seems_utf8($str) {
    
$length strlen($str);
    for (
$i=0$i $length$i++) {
        
$c ord($str[$i]);
        if (
$c 0x80$n 0# 0bbbbbbb
        
elseif (($c 0xE0) == 0xC0$n=1# 110bbbbb
        
elseif (($c 0xF0) == 0xE0$n=2# 1110bbbb
        
elseif (($c 0xF8) == 0xF0$n=3# 11110bbb
        
elseif (($c 0xFC) == 0xF8$n=4# 111110bb
        
elseif (($c 0xFE) == 0xFC$n=5# 1111110b
        
else return false# Does not match any model
        
for ($j=0$j<$n$j++) { # n bytes matching 10bbbbbb follow ?
            
if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))
                return 
false;
        }
    }
    return 
true;
}

This article was last updated 28th November 2020 23:05 Europe/London time based on the source file dated 7th July 2020 14:31 Europe/London time.