Compute average value from multi array with one loop - php

Question

I have some code which remove parameters from every url from array.
Then it sums a scores for every matched url-keyword and finally it shoud get average value from one of value 'position'.
Everythink works for me. But I am thinkink is there any way to do it with one loop? Now I use two loops for it.
One of them sum values for me. Then I need use a foreach and divide sum of my values by count my matched keyword-url occurred.
Maybe someone have idea how can I compute average 'position' score in one loop?
<?php
$keywordsUrlsArray = array(
0 => array
(
'url' => 'https://www.example.pl/?test=19',
'keyword' => 'test',
'score1' => 100,
'score2' => 50,
'position' => 4
),
1 => array
(
'url' => 'https://www.example.pl/?test=2',
'keyword' => 'test',
'score1' => 100,
'score2' => 50,
'position' => 1
),
2 => array
(
'url' => 'https://www.example.pl/?test=3',
'keyword' => 'test',
'score1' => 100,
'score2' => 50,
'position' => 3
),
3 => array
(
'url' => 'https://www.example.pl/other-site?test=3',
'keyword' => 'test',
'score1' => 100,
'score2' => 50,
'position' => 3
)
);
And there is code for it.
$res = array();
foreach ($keywordsUrlsArray as $urlResults) {
//remove params from url
$parsedUrl = parse_url($urlResults['url']);
$parsedUrl = $parsedUrl['scheme'] . '://' . $parsedUrl['host'] . $parsedUrl['path'];
$keyword = $urlResults['keyword'];
if (array_key_exists($parsedUrl, $res)) {
//check if parsed url with removed parameters exists and if it has the same keyword I need to sum scores
if (isset($res[$parsedUrl][$keyword])) {
$res[$parsedUrl][$keyword]['urlCount'] += 1;
$res[$parsedUrl][$keyword]['score1'] += $urlResults['score1'];
$res[$parsedUrl][$keyword]['score2'] += $urlResults['score2'];
$res[$parsedUrl][$keyword]['position'] += $urlResults['position'];//my problem is there any way to compute my average position wtihout do a second foreach below?
continue;
}
}
$res[$parsedUrl][$keyword] = $urlResults;
$res[$parsedUrl][$keyword]['url'] = $parsedUrl;
$res[$parsedUrl][$keyword]['urlCount'] = 1;
}
//there I have to do a second foreach to compute average keyword/url position
//and compute position which will be sum of all positions divided by every matched keyword/url
$result = [];
foreach ($res as $k => $r) {
foreach ($r as $p => $t) {
$t['position'] = $t['position'] / $t['urlCount'];
unset($t['urlCount']);
$result[] = $t;
}
}
var_dump( $result);
return $result;
}
And there is my result. Sum of positions divided by occured urls.
array(2) {
[0]=>
array(5) {
["url"]=>
string(23) "https://www.example.pl/"
["keyword"]=>
string(4) "test"
["score1"]=>
int(300)
["score2"]=>
int(150)
["position"]=>
float(2.6666666666667)
}
[1]=>
array(5) {
["url"]=>
string(33) "https://www.example.pl/other-site"
["keyword"]=>
string(4) "test"
["score1"]=>
int(100)
["score2"]=>
int(50)
["position"]=>
int(3)
}
}

Answer 1

You can keep track of the sum of the positions, and update the position every time you have a match for the url.
At the end of your code, init the first sum to prevent missing the first match.
foreach ($keywordsUrlsArray as $urlResults) {
$parsedUrl = parse_url($urlResults['url']);
$parsedUrl = $parsedUrl['scheme'] . '://' . $parsedUrl['host'] . $parsedUrl['path'];
$keyword = $urlResults['keyword'];
if (array_key_exists($parsedUrl, $res)) {
if (isset($res[$parsedUrl][$keyword])) {
$res[$parsedUrl][$keyword]['urlCount'] += 1;
$res[$parsedUrl][$keyword]['score1'] += $urlResults['score1'];
$res[$parsedUrl][$keyword]['score2'] += $urlResults['score2'];
$res[$parsedUrl][$keyword]['sumPosition'] += $urlResults['position'];
$res[$parsedUrl][$keyword]['position'] = $res[$parsedUrl][$keyword]['sumPosition'] / $res[$parsedUrl][$keyword]['urlCount'];
continue;
}
}
$res[$parsedUrl][$keyword] = $urlResults;
$res[$parsedUrl][$keyword]['url'] = $parsedUrl;
$res[$parsedUrl][$keyword]['urlCount'] = 1;
$res[$parsedUrl][$keyword]['sumPosition'] = $urlResults['position'];
}
It will give you the position in the same loop, but you will still have the keys urlCount and sumPosition in the final arrays.
See a php demo.