The function treats '_' as after letters and numbers when it would be placed before logically.
(PHP 4, PHP 5, PHP 7, PHP 8)
strnatcasecmp — Comparación de strings, insensible a mayúsculas y minúsculas, utilizando un algoritmo de "orden natural"
$str1
, string $str2
): intEsta función implementa un algoritmo de comparación que ordena strings alfanuméricos de la manera en que un humano lo haría. El comportamiento de ésta función es similar a strnatcmp(), excepto que la comparación no es sensible a mayúsculas y minúscula. Para más información ver la página de Martin Pool: » Natural Order String Comparison.
str1
El primer string.
str2
El segundo string.
De forma similar a otras funciones de comparación, esta devuelve < 0 si
str1
es menor que str2
; >
0 si str1
es mayor que
str2
y 0 si son iguales.
The function treats '_' as after letters and numbers when it would be placed before logically.
Use strnatcmp to avoid the _ problem as mentioned below;
<< The function treats '_' as after letters and numbers when it would be placed before logically. >>
There seems to be a bug in the localization for strnatcmp and strnatcasecmp. I searched the reported bugs and found a few entries which were up to four years old (but the problem still exists when using swedish characters).
These functions might work instead.
<?php
function _strnatcasecmp($left, $right) {
return _strnatcmp(strtolower($left), strtolower($right));
}
function _strnatcmp($left, $right) {
while((strlen($left) > 0) && (strlen($right) > 0)) {
if(preg_match('/^([^0-9]*)([0-9].*)$/Us', $left, $lMatch)) {
$lTest = $lMatch[1];
$left = $lMatch[2];
} else {
$lTest = $left;
$left = '';
}
if(preg_match('/^([^0-9]*)([0-9].*)$/Us', $right, $rMatch)) {
$rTest = $rMatch[1];
$right = $rMatch[2];
} else {
$rTest = $right;
$right = '';
}
$test = strcmp($lTest, $rTest);
if($test != 0) {
return $test;
}
if(preg_match('/^([0-9]+)([^0-9].*)?$/Us', $left, $lMatch)) {
$lTest = intval($lMatch[1]);
$left = $lMatch[2];
} else {
$lTest = 0;
}
if(preg_match('/^([0-9]+)([^0-9].*)?$/Us', $right, $rMatch)) {
$rTest = intval($rMatch[1]);
$right = $rMatch[2];
} else {
$rTest = 0;
}
$test = $lTest - $rTest;
if($test != 0) {
return $test;
}
}
return strcmp($left, $right);
}
?>
The code is not optimized. It was just made to solve my problem.