How do I Sum Values Within a Foreach Loop in PHP?

Summing Values Within a Foreach Loop in PHP

In PHP, using a foreach loop to iterate through an array allows for the key-value pairs to be accessed. This mechanism becomes useful when requiring specific data extraction or manipulation. However, if the goal is to calculate the sum of values associated with these keys, an additional approach is needed.

Consider the following example:

foreach($group as $key => $value)
{
    echo $key . " = " . $value . "<br>";
}

This loop will echo the key-value pairs, resulting in an output similar to:

doc1 = 8
doc2 = 7
doc3 = 1

To sum the values associated with these keys, a separate variable must be initialized to accumulate these values:

$sum = 0;
foreach($group as $key => $value)
{
   $sum+= $value;
}
echo $sum;

In this example, the $sum variable is initialized to 0 and incremented by the value associated with each key during each iteration. After the loop completes, $sum contains the summation of all values, which can then be echoed to display the result, in this case, 16.

This approach allows for the efficient summation of values within a foreach loop, making it convenient for various data analysis or calculation tasks.

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