Encodes the Unicode values to be used in the URI.
Parameters
$utf8_string
stringrequired- String to encode.
$length
intrequired- Max length of the string
$encode_ascii_characters
booloptional- Whether to encode ascii characters such as < " ‘
Default:
false
Source
function utf8_uri_encode( $utf8_string, $length = 0, $encode_ascii_characters = false ) {
$unicode = '';
$values = array();
$num_octets = 1;
$unicode_length = 0;
mbstring_binary_safe_encoding();
$string_length = strlen( $utf8_string );
reset_mbstring_encoding();
for ( $i = 0; $i < $string_length; $i++ ) {
$value = ord( $utf8_string[ $i ] );
if ( $value < 128 ) {
$char = chr( $value );
$encoded_char = $encode_ascii_characters ? rawurlencode( $char ) : $char;
$encoded_char_length = strlen( $encoded_char );
if ( $length && ( $unicode_length + $encoded_char_length ) > $length ) {
break;
}
$unicode .= $encoded_char;
$unicode_length += $encoded_char_length;
} else {
if ( count( $values ) === 0 ) {
if ( $value < 224 ) {
$num_octets = 2;
} elseif ( $value < 240 ) {
$num_octets = 3;
} else {
$num_octets = 4;
}
}
$values[] = $value;
if ( $length && ( $unicode_length + ( $num_octets * 3 ) ) > $length ) {
break;
}
if ( count( $values ) === $num_octets ) {
for ( $j = 0; $j < $num_octets; $j++ ) {
$unicode .= '%' . dechex( $values[ $j ] );
}
$unicode_length += $num_octets * 3;
$values = array();
$num_octets = 1;
}
}
}
return $unicode;
}
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