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"
Esta 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.