How do i create a loop for this?

[Brandon_R]

Hello guys can someone show me how to create a loop for this array echoing out the result. The array is

 

$hello = array("hello", "guys", "hows", "it");

$goodbye = array("Its", "going", "find", "thanks");

$aiight = array("Good", "then", "thats", "well");

 

After the above array is run through the loop the result for each echo should be

 

Hello Its Good

Guys Going Then

Hows find thats

It thanks well.

 

I tried nested foreach loops and the result was catastrophic. It was more like a factorial problem than matching the first element in the array with the first element in the other 2 arrays.

[mikesta707]

assuming the 3 arrays will always be the same length

$hello = array("hello", "guys", "hows", "it");
$goodbye = array("Its", "going", "find", "thanks");
$aiight = array("Good", "then", "thats", "well");

for ($i = 0; $i < count($hello); $i++){
echo $hello[$i]." ".$goodbye[$i]." ".$aiight[$i]."<br />";
}

 

if they aren't always the same size this won't work as expected

[cags]

<?php
$count = count($hello);
for($i = 0; $i < $count; $i++) {
  echo $hello[$i] . " " . $goodbye[$i] . " " . $aiight[$i] . '<br />';
}
?>

 

EDIT: D'oh beaten to the punch, oh well, I think my $count method would be slightly more optimised.

[mikesta707]

I don't see how it would be any more optimised

[Alex]

I don't see how it would be any more optimised

I think he means because count($hello) won't have to be pre-preformed every loop. The time difference would be so minimal.. it really wouldn't matter. Personally I'd use Mikesta707's method only because there's no need for that additional variable / line when it's going to save 0.000001 second. The general fluctuations in execution time would be considerably larger than the time that might save.

[Brandon_R]

Is there any other way to do it?

[Alex]

Is there any other way to do it?

What's wrong with those ways?

[Brandon_R]

Can't get it to work.

 

Edit, i now see they have to contain the same amount of of values in the array so they can get matched. Ill see if i can write an error checking to stop if it doesn't match. Im new at PHP so ill need a little help.

[Philip]

Given they are the same lengths, with the same keys (in this case numerical).. no need for the count($array) in a for statement... thats why they made foreach

$hello = array("hello", "guys", "hows", "it");

$goodbye = array("Its", "going", "find", "thanks");

$aiight = array("Good", "then", "thats", "well");

foreach($hello as $key => $value) {
echo $value.' '.$goodbye[$key].' '.$aiight[$key].'<br>';
}

 

Well - if they aren't the same length what do you want the script to do? Provide a blank space, or re-use another value somewhere?

[Brandon_R]

How about simply halt execution. Ill add my error message later on when im finalizing the script.

[Brandon_R]

Actually king phillip can you show me how to check each array to make sure they contain the same number of values and if they don't echo out an error message such as this is not an array.

[cags]

Not sure if it's the best way, but...

 

<?php
$length = count($array1);
if(count($array2) != $length || count($array3) != $length) {
   echo 'Lengths do not match';
}
?>

[Philip]

Not sure if it's the best way, but...

 

<?php
$length = count($array1);
if(count($array2) != $length || count($array3) != $length) {
   echo 'Lengths do not match';
}
?>

 

Is just fine, just change the array variables to match your script.