I have an array like this:
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- How do you find the maximum and minimum value of an array in PHP?
- How do you find the minimum and maximum value in PHP?
- How do I find the smallest number in an array in PHP?
- How do you find the max value in an array?
array [0 =>
array [
'id' => '20110209172713',
'Date' => '2011-02-09',
'Weight' => '200',
],
1 =>
array [
'id' => '20110209172747',
'Date' => '2011-02-09',
'Weight' => '180',
],
2 =>
array [
'id' => '20110209172827',
'Date' => '2011-02-09',
'Weight' => '175',
],
3 =>
array [
'id' => '20110211204433',
'Date' => '2011-02-11',
'Weight' => '195',
],
]
I need to extract minimal and maximal Weight values. In this example
$min_value = 175
$max_value = 200
Any help on how to do this ? Thank you !
asked May 1, 2011 at 3:06
2
Option 1. First you map the array to get those numbers [and not the full details]:
$numbers = array_column[$array, 'weight']
Then you get the min and max:
$min = min[$numbers];
$max = max[$numbers];
Option 2. [Only if you don't have PHP 5.5 or better] The same as option 1, but to pluck the values, use array_map:
$numbers = array_map[function[$details] {
return $details['Weight'];
}, $array];
Option 3.
Option 4. If you
only need a min OR max, array_reduce[] might be faster:
$min = array_reduce[$array, function[$min, $details] {
return min[$min, $details['weight']];
}, PHP_INT_MAX];
This does more min[]s, but they're very fast. The PHP_INT_MAX is to start with a high, and get lower and lower. You could do the same for $max, but you'd start at 0, or -PHP_INT_MAX.
ashleedawg
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answered May 1, 2011 at 3:11
RudieRudie
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0
foreach [$array as $k => $v] {
$tArray[$k] = $v['Weight'];
}
$min_value = min[$tArray];
$max_value = max[$tArray];
answered May 1, 2011 at 3:09
Crayon ViolentCrayon Violent
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For the people using PHP 5.5+ this can be done a lot easier with array_column. Not need for those ugly array_maps anymore.
How to get a max value:
$highest_weight = max[array_column[$details, 'Weight']];
How to get the min value
$lowest_weight = min[array_column[$details, 'Weight']];
answered Jan 24, 2014 at 11:04
RJD22RJD22
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It is interesting to note that both the solutions above use extra storage in form of arrays [first one two of them and second one uses one array] and then you find min and max using "extra storage" array. While that may be acceptable in real programming world [who gives a two bit about "extra" storage?] it would have got you a "C" in programming 101.
The problem of finding min and max can easily be solved with just two extra memory slots
$first = intval[$input[0]['Weight']];
$min = $first ;
$max = $first ;
foreach[$input as $data] {
$weight = intval[$data['Weight']];
if[$weight $max ] {
$max = $weight ;
}
}
echo " min = $min and max = $max \n " ;
answered May 1, 2011 at 6:08
rjha94rjha94
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1
How about without using predefined
functions like min or max ?
//find max
$arr = [4,5,6,1];
$val = $arr[0];
$n = count[$arr];
for[$i=0;$i array ['id' => '20110209172713', 'Date' => '2011-02-09', 'Weight' => '200'],
1 => array ['id' => '20110209172747', 'Date' => '2011-02-09', 'Weight' => '180'],
2 => array ['id' => '20110209172827', 'Date' => '2011-02-09', 'Weight' => '175'],
3 => array ['id' => '20110211204433', 'Date' => '2011-02-11', 'Weight' => '195']];
foreach[$num as $key => $val]
{
$weight[] = $val['Weight'];
}
echo max[$weight];
echo min[$weight];
answered Jan 10, 2013 at 6:44
answered Nov 11, 2013 at 19:33
HanifeogluHanifeoglu
492 silver badges11 bronze badges
$Location_Category_array = array[5,50,7,6,1,7,7,30,50,50,50,40,50,9,9,11,2,2,2,2,2,11,21,21,1,12,1,5];
asort[$Location_Category_array];
$count=array_count_values[$Location_Category_array];//Counts the values in the array, returns associatve array
print_r[$count];
$maxsize = 0;
$maxvalue = 0;
foreach[$count as $a=>$y]{
echo "
".$a."=".$y;
if[$y>=$maxvalue]{
$maxvalue = $y;
if[$a>$maxsize]{
$maxsize = $a;
}
}
}
echo "
max = ".$maxsize;
answered Jan 21, 2016 at 2:29
PanditPandit
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1
print fast five maximum and minimum number from array without use of sorting array in php :-
answered Jan 17, 2017 at 6:04
1
Not the answer you're looking for? Browse other questions tagged php arrays extract or ask your own question.
How do you find the maximum and minimum value of an array in PHP?
$min = min[$numbers]; $max = max[$numbers]; Option 2. [Only if you don't have PHP 5.5 or better] The same as option 1, but to pluck the values, use array_map : $numbers = array_map[function[$details] { return $details['Weight']; }, $array];
How do you find the minimum and maximum value in PHP?
Approach 2 [Using Library Functions] : We use library functions to find minimum and maximum..
Max[]:max[] returns the parameter value considered “highest” according to standard comparisons. ... .
Min[]:min[] returns the parameter value considered “lowest” according to standard comparisons..
How do I find the smallest number in an array in PHP?
php function get_min_value[$my_array]{ $n = count[$my_array]; $min_val = $my_array[0]; for [$i = 1; $i < $n; $i++] if [$min_val > $my_array[$i]] $min_val = $my_array[$i]; return $min_val; } $my_array = array[56, 78, 91, 44, 0, 11]; print_r["The lowest value of the array is "]; echo[get_min_value[$my_array]]; echo["\n" ...
How do you find the max value in an array?
To get the index of the max value in an array:.
Get the max value in the array, using the Math. max[] method..
Call the indexOf[] method on the array, passing it the max value..
The indexOf method returns the index of the first occurrence of the value in the array or -1 if the value is not found..