CODEWITHSUNDEEP
phploopsif-statement
Martin AJ
Martin AJ

Reputation: 6697

How can I make a conditional loop?

I have an array that contains different number of items every time. And I need to put this condition on the way of it:

"if the number of items are less than 2, then print nothihg, if the number of items are between 2 and 4, then print the first two items, if there are 5 items, then print all items".

Noted that the max number of array's items is 5.

$myarr = ["one", "two", "three"];
foreach($myarr as $item){
    if( count($myarr) >= 2 && count($myarr) < 5 ){
        echo $myarr[0].PHP_EOL;
        echo $myarr[1];
    } else if( count($myarr) == 5 ){
        echo $myarr[0].PHP_EOL;
        echo $myarr[1].PHP_EOL;
        echo $myarr[2].PHP_EOL;
        echo $myarr[3].PHP_EOL;
        echo $myarr[4];
    } else {
        echo "nothing"; 
        break;
    }
}

As you can see, I've used echo $var[i] statically. How can make it shorter and dynamical?

Upvotes: 1

Views: 88

Answers (3)

bitto kazi
bitto kazi

Reputation: 171

$myarr = ["one", "two", "three", "four", "five"];
$output = '';
foreach($myarr as $k=>$item){
    if( count($myarr) >= 2 && count($myarr) < 5 && $k<2){
        $output .= $item.PHP_EOL;
    } else if( count($myarr) == 5 ){
        $output .= $item.PHP_EOL;
    } else if(count($myarr) <2) {
        $output .= "nothing"; 
        break;
    }
}
echo $output;

Upvotes: 0

M. Eriksson
M. Eriksson

Reputation: 13635

There's many ways to skin this cat. These are my two cents:

Clean and readable version

$array = ["one", "two", "three"];

$count = count($array);
$iterations = 0;

if ($count < 2) {
    echo 'nothing';
} else {
    $iterations = $count <= 4 ? 2 : $count;
}

for ($i = 0; $i < $iterations; $i++) {
    echo $array[$i] . PHP_EOL;
}

Demo: https://3v4l.org/CWHuj

More compact, harder to read and full of bad practices:

Note: This version was just for fun. Writing code like this in any other context should be illegal.

$array = ["one", "two", "three"];
$count = count($array);
if (!$iterations = $count < 2 ? 0 : ($count <= 4 ? 2 : $count)) echo "nothing";
for ($i = 0; $i < $iterations; $i++) echo $array[$i] . PHP_EOL;

Demo: https://3v4l.org/N1fnv

Upvotes: 4

Sebastian Brosch
Sebastian Brosch

Reputation: 43574

You can use the following solution:

<?php
$myarr = ["one", "two", "three"];
$items_count = count($myarr);

if ($items_count < 2) {
    echo "nothing";
} elseif ($items_count >= 2 && $items_count <= 4) {
    echo implode(PHP_EOL, array_slice($myarr, 0, 2));
} else {
    echo implode(PHP_EOL, $myarr);
}

demo: https://ideone.com/sG3Nm5

You don't need the foreach loop in this case. A simple list of conditions using count can do it.

Upvotes: 6

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