Foreach loop in array, getting occurrence value

Question

I have simple foreach loop in an array

<?php  
$colors = array("red", "green", "blue", "yellow");

foreach ($colors as $value) {
  echo "$value <br>";
}
?>

I would like to get the occurence number of the value, something like "$value is X occurence <br>" so the text would be:

red is 0 occurence

green is 1 occurence

....

How can I do that?

So you want the total number for each element or the position of the element(aka the key)? If you just want the position do foreach($arr as $position => $value) — Andrei
– Andrei, Commented Feb 5, 2018 at 9:00
foreach ($colors as $key=>$value) { echo "$key => $value <br>"; } — splash58
– splash58, Commented Feb 5, 2018 at 9:01
total number, because I have an array and I need to address a specific ID to all of them to make sth like this: id="carousel-selector-0 id="carousel-selector-1 ... — servitus
– servitus, Commented Feb 5, 2018 at 9:02

Swadesh Ranjan Dash · Accepted Answer · 2018-02-05 11:00:28Z

2

USE THIS

<?php  
$colors = array("red", "green", "blue", "yellow");

foreach ($colors as $key=>$value) {
  echo $value . " is " . $key . " occurence <br>";
}
?>

edited Feb 5, 2018 at 11:00

answered Feb 5, 2018 at 9:05

Swadesh Ranjan Dash

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Comments

Annapurna · Accepted Answer · 2018-02-05 09:09:08Z

1

When you use foreach, you can have the key as well as the value. Here, since you have not specified the key, the key will be the index value of the array elements. To get the occurence, you need to use foreach($colors as $index => $value)

<?php  
$colors = array("red", "green", "blue", "yellow");

foreach ($colors as $index => $value) {
  echo "$value is $index occurence <br>";
}

answered Feb 5, 2018 at 9:09

Annapurna

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Comments

Tommaso Belluzzo · Accepted Answer · 2018-02-05 09:30:35Z

1

There is no need to use exotic functions to achieve this. Just replace the foreach loop with a for loop, so you will have a ready-made indexer to use:

<?php

    $colors = array("red", "green", "blue", "yellow");

    for ($i = 0; $i < count($colors); ++$i) {
        echo $colors[$i]." is ".$i." occurrence<br>";
    }

?>

Alternatively, but only because your array doesn't define the keys, you can use the following approach:

<?php

    $colors = array("red", "green", "blue", "yellow");

    foreach ($colors as $index=>$value) {
        echo "$value is $index occurrence<br>";
    }

?>

edited Feb 5, 2018 at 9:30

answered Feb 5, 2018 at 9:15

Tommaso Belluzzo

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Comments

Sagar Gautam · Accepted Answer · 2018-02-05 09:07:36Z

0

Use array_count_values function to get desired result.

$colors = array("red", "green", "blue", "yellow");
$counts = array_count_values($colors);

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

See docs http://php.net/manual/en/function.array-count-values.php here

answered Feb 5, 2018 at 9:07

Sagar Gautam

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Comments

molinet · Accepted Answer · 2018-02-05 09:08:02Z

0

Try this as I suggested in the comments section:

<?php  
$colors = array("red", "green", "blue", "yellow");
$occurences = array_count_values($colors);

foreach ($colors as $value) {
   echo "$value is $occurences[$value] <br>";
}
?>

answered Feb 5, 2018 at 9:08

molinet

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