Sort PHP array of string (line) with two substring - php

Question

I wanted to sort php array based on CRITICAL , WARNING ,INFO sub string and then CRITICAL , WARNING ,INFO sub array should be sorted again with the time stamp value contains in each line of string in acsending order.
Basically at the end I need array to be sorted with CRITICAL 1st with time stamp sorted then WARNING and then INFO so on..

Answer 1

First, define a function that turns the urgency of a line into a number.
function urgency($line)
{
if (strpos($line, 'INFO') !== false) {
return 1;
} elseif (strpos($line, 'WARNING') !== false) {
return 2;
} elseif (strpos($line, 'CRITICAL') !== false) {
return 3;
}
return 0;
}
Then, assuming each element of your array contains a line of the file, you need to apply a decorator to keep the sort stable; see also my earlier answer on the subject:
array_walk($array, function(&$element, $index) {
$element = array($element, $index); // decorate
});
After applying the decorator, you sort the array; I'm using a stable comparison helper:
function stablecmp($fn)
{
return function($a, $b) use ($fn) {
if (($tmp = call_user_func($fn, $a[0], $b[0])) != 0) {
return $tmp;
} else {
return $a[1] - $b[1];
}
};
}
usort($array, stablecmp(function($a, $b) {
return urgency($b) - urgency($a);
}));
Finally, undecorate the array to produce the end result:
array_walk($array, function(&$element) {
$element = $element[0];
});

Answer 2

Getting CRITICAL on the sorted order
function my_cmp($a, $b){
$pieces_a = explode("CRITICAL", $a);
$pieces_b = explode("CRITICAL", $b);
if(!isset($pieces_a[1]) && isset($pieces_b[1])) {
return 1;
}
elseif(!isset($pieces_b[1]) && isset($pieces_a[1])) {
return -1;
}
elseif(!isset($pieces_a[1]) && !isset($pieces_b[1])) {
return 0;
}
return strcasecmp($pieces_a[1], $pieces_b[1]);
}
usort($arr, "my_cmp");
But this can only sort if the each line has non spaces I mean single word,.
Any other solution curious to know?