The goal is to compare the current array element qty
with the previous and if the condition is met return success, ie: if current element qty is 0 and the previous element qty is greater than 5 return
.
Research keeps popping up PHP's current(), next(),
and prev()
tools however I'm not getting the return I hope for with these attempts:
1.
for($i = 0; $i < $length -1; ++$i){
if(current($myArray[0]['qty']) == 0 && prev($myArray[0]['qty']) > 5){
echo 'success!';
}
}
2.
foreach($myArray as $item){
if(current($item['qty']) == 0 && prev($item['qty'] > 5)){
echo 'success!';
} else {
continue;
}
}
Admittedly I'm not familiar with all of PHP's available tools and options so if there's something else I should be learning about and using I'd be grateful for suggestions.
Here's my sample array:
$myArray = Array
(
[0] => Array
(
[0] => foo
[name] => foo
[1] => 15
[qty] => 15
)
[1] => Array
(
[0] => bar
[name] => bar
[1] => 0
[qty] => 0
)
[2] => Array
(
[0] => baz
[name] => baz
[1] => 47
[qty] => 47
)
)
My desired result would be the following for an automatic email: **bar** is empty, check **foo** for replenishment!
You cannot use prev()
to get the previous element of an array during a for
loop, because the loop doesn't change the internal array pointer. Also, the prev()
function should be used on the array, not on a value.
You can use the index of the foreach()
and check if the $array[$index-1]
exists and if its value match to your condition:
$myArray = array(
0 => array(0 => 'foo', 'name' => 'foo', 1 => 15, 'qty' => 15),
1 => array(0 => 'bar', 'name' => 'bar', 1 => 0, 'qty' => 0),
2 => array(0 => 'baz', 'name' => 'baz', 1 => 47, 'qty' => 47)
);
foreach ($myArray as $index => $item) {
// if index is greater than zero, you could access to previous element:
if ($item['qty'] == 0 && $index > 0 && $myArray[$index-1]['qty'] > 5) {
$current_name = $item['name'];
$previous_name = $myArray[$index-1]['name'];
echo "'$current_name' is empty, check '$previous_name' for replenishment!";
} else {
continue;
}
}
Output:
'bar' is empty, check 'foo' for replenishment!
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