Some basic uses of common arrays in PHP

Some basic uses and operations of common arrays in PHP:

Indexed array
$arr =array ("AA", "SS", "DD", "FF");
echo $arr [0]. $arr [1]. $arr [2]. ', '. $arr [3];

Gets the length of the array
echo count ($arr);

Iterating through an indexed array
for ($i =0; $i <count ($arr); $i + +)
{
echo $arr [$i];
echo "\ n";
}

foreach ($arr as $item)
{
Echo $item;
echo "\ n";
}

Associative arrays
$arr =array ("a" = "a", "s" = "s", "q" = "q");
foreach ($arr as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}

Array sorting
Sort in ascending majority group
$arr =array ("6", "2", "1", "7", "5");
Sort ($arr);
foreach ($arr as $item)
{
Echo $item;
echo "\ n";
}
Sort in descending order
Rsort ($arr);
foreach ($arr as $item)
{
Echo $item;
echo "\ n";
}

Sort associative arrays in ascending order based on values
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
Asort ($age);
foreach ($age as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}
Sort associative arrays in descending order by value
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
Arsort ($age);
foreach ($age as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}
Sort associative arrays in ascending order by key
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
Ksort ($age);
foreach ($age as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}
Sort associative arrays in descending order by key
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
Krsort ($age);
foreach ($age as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}

Get all the values in the associative array
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
$arr =array_values ($age);
foreach ($arr as $item)
{
Echo $item;
echo "\ n";
}
Gets all the key names in the associative array
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
$arr =array_keys ($age);
foreach ($arr as $item)
{
Echo $item;
echo "\ n";
}

Checks if a value exists in the array
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
Echo In_array (' 9 ', $age);

Exchanging keys and values in an array
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
$newage =array_flip ($age);
foreach ($newage as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}

Returns an array of the opposite of a cell array
$age =array ("A" and "one"), "s" and "9", "R" and "All", "D" and "8";
$newage =array_reverse ($age);
foreach ($newage as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}

Count the occurrences of all the values in the array
$age =array ("a" = "one", "s" = "9", "r" = "9", "D" and "8");
$num =array_count_values ($age);
foreach ($num as $item)
{
echo $item. ' ‘;
}

Removes duplicate values from an array, leaving only one
$age =array ("a" = "one", "s" = "9", "r" = "9", "D" and "8");
$newage =array_unique ($age);
foreach ($newage as $key = $item)
{
echo $key. ' = '. $item;
echo "\ n";
}

Merging arrays
$arr 1=array ("1", "2", "3", "4");
$arr 2=array ("2", "3", "5", "1");
$arr =array_merge ($arr 1, $arr 2);
foreach ($arr as $item)
{
echo $item. ', ';
}

Computes the intersection of an array
$arr 1=array ("1", "2", "3", "4");
$arr 2=array ("2", "3", "5", "1");
$arr =array_intersect ($arr 1, $arr 2);
foreach ($arr as $item)
{
echo $item. ', ';
}

Calculates the difference of an array
$arr 1=array ("1", "2", "3", "4");
$arr 2=array ("2", "3", "5", "1");
$arr =array_diff ($arr 2, $arr 1);
foreach ($arr as $item)
{
echo $item. ', ';
}

Randomly fetching one or more elements from an array
$arr =array ("1", "A", "3", "E", "E", "4", "E");
$newarr =array_rand ($arr);
Echo $newarr;
echo "\ n";
$arr 1=array_rand ($arr, 3);
foreach ($arr 1 as $item)
{
echo $item. ', ';
}

To disrupt an array
$arr =array ("1", "2", "3", "4", "5", "6", "7");
Shuffle ($arr);
Print_r ($arr);
foreach ($arr as $item)
{
echo $item. ', ';
}

Rounding, removing the value after the decimal point
echo Floor (15.4);

Some basic uses of common arrays in PHP