PHP explode - running loop through each array item

Question

Here's the issue:

I retrieve the following data string from my database:

$row->exceptions = '1,2,3';

After explode I need the below code to check each one of the exploded pieces

$exceptions = explode(",", $row->exceptions);

//result is 
//[0] => 1
//[1] => 2
//[2] => 3

for ($i = 0; $i <= $row->frequency; $i++) {

    if ($exceptions[] == $i) {

        continue;

    } else {

        //do something else
    }
}

How can I make $exceptions[] loop through all keys from the exploded array so it evaluates if ==$i?

Thanks for helping.

possible duplicate of [Find Value in Array](http://stackoverflow.com/questions/4703004/find-value-in-array) — Ignacio Vazquez-Abrams, May 08 '11 at 05:34
not sure about that - here i am in need of a solution not to find a specific key, but to loop through all keys — pepe, May 08 '11 at 05:37
I'm not sure I got your question, so I'm posting a comment: if I got it, it should suffice to substitute "if($exceptions[] == $i)" with "if(in_array($i,$exceptions))". — Paolo Stefan, May 08 '11 at 05:50
@paolo, that's an elegant solution and works nicely - would you mind posting it as answer? - thanks — pepe, May 08 '11 at 05:55

score 2 · Accepted Answer · answered May 08 '11 at 05:58

2

It should suffice to substitute:

if($exceptions[] == $i)

with:

if(in_array($i,$exceptions))

By the way, it eliminates the need for a nested loop.

answered May 08 '11 at 05:58

Paolo Stefan

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score 1 · Answer 2 · answered May 08 '11 at 05:50

1

Ah, should be straightforward, no?

$exceptions = explode(",", $row->exceptions);
for ($i = 0; $i <= $row->frequency; $i++) {

    foreach($exceptions as $j){
    if($j == $i){
        // do something
        break;
    }
}
}

answered May 08 '11 at 05:50

Femi

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Glad to help: `in_array` is more elegant. No reason not to use the platform functions if they are available and fit the task. – Femi May 08 '11 at 05:58

score 0 · Answer 3 · answered May 08 '11 at 05:50

0

I think I understand what you are asking. Here's how you would test within that loop whether the key equals $i.

for ($i = 0; $i <= $row->frequency; $i++)
{
  foreach ($exceptions as $key => $value)
  {
    if ($key == $i)
    {
      continue;
    }
  }
}

answered May 08 '11 at 05:50

James Skidmore

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PHP explode - running loop through each array item

3 Answers3

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