Question

I’m having the following problem and quite frankly no idea how to solve it:

Each array has a numeric value in key[0] and a time in key[1]. My goal is to map this output against a 24 hour period.

Sum all key[0] values where key[1] time is between 00:00 – 01:00, 01:00 – 02:00, etc.

If there are no values in a certain time period, “0” should be printed.

Here are the arrays that hold the values:

Array ( 

[4045862944400] => Array ( 
[0] => 192 
[1] => 23:52 
) 
[403274909688162] => Array ( 
[0] => 186 
[1] => 22:21 
) 
[402735273075459] => Array ( 
[0] => 311 
[1] => 04:29 
) 
[252948031457462] => Array ( 
[0] => 385 
[1] => 06:22 
) 
[400606749954978] => Array ( 
[0] => 287 
[1] => 05:01 
) 
[286755318061725] => Array ( 
[0] => 358 
[1] => 04:51 
) 
[399687880046865] => Array ( 
[0] => 257 
[1] => 21:51 
) 
[398332190182434] => Array ( 
[0] => 240 
[1] => 23:19 
) 
[397768486905471] => Array ( 
[0] => 311 
[1] => 05:38 
) 
[396907650324888] => Array ( 
[0] => 293 
[1] => 03:38 
) 
[394850557197264] => Array ( 
[0] => 496 
[1] => 05:12 
) 
[394121230603530] => Array ( 
[0] => 475 
[1] => 04:15 
) 
[69757766367627] => Array ( 
[0] => 488 
[1] => 04:01 
) 
[391602517522068] => Array ( 
[0] => 506 
[1] => 03:44 
) 
[390848830930770] => Array ( 
[0] => 437 
[1] => 06:05 
) 
[389975351018118] => Array ( 
[0] => 452 
[1] => 04:00 
) 
[242486689170043] => Array ( 
[0] => 525 
[1] => 04:13 
) 
[388151047867215] => Array ( 
[0] => 415 
[1] => 00:22 
) 
[387476447934675] => Array ( 
[0] => 502 
[1] => 04:51 
) 
[386620518020268] => Array ( 
[0] => 467 
[1] => 06:05 
) 
[215937481836499] => Array ( 
[0] => 359 
[1] => 01:10 
) )

The output should be an array that represents 24 hours and has the according sum of values for each hour.

Answer 1

Here’s an idea to get you going:

$hours = array();
foreach($input as $v) {
   $lowerHour = array_shift(explode(':', $v[1]));

   if(!array_key_exists($lowerHour, $hours)) $hours[$lowerHour] = 0;
   $hours[$lowerHour] += $v[0];
}

print_r($hours);