PHP loop foreach determine 2nd and 3rd iteration

Question

How can I detect 2nd and 3rd iteration

Here's what I did but It doesn't give the right answer

$sample_array = array('boom 1','boom 2','boom 3','boom 4','boom 5','boom 6','boom 7');

                            $separator2 = 0;
                            $separator3 = 0;
                            foreach($sample_array as $sample_array_value){
                                if(++$separator3 % 3 == 0)
                                {
                                    echo $sample_array_value."<br /><br /> Separator 3 <br /><br />";
                                }
                                else if(++$separator2 % 2 == 0)
                                {
                                    echo $sample_array_value."<br /><br /> Separator 2 <br /><br />";
                                }
                                else
                                {
                                    echo $sample_array_value."<br />";
                                }
                            }

the output of that code is:

boom 1
boom 2

Separator 2 

boom 3

Separator 3 

boom 4
boom 5

Separator 2 

boom 6

Separator 3 

boom 7

Which is wrong, I need the output to be:

boom 1
boom 2

Separator 2 

boom 3

Separator 3 

boom 4

Separator 2 

boom 5
boom 6

Separator 2 
Separator 3 

boom 7

Rizier123 · Accepted Answer · 2015-07-12 13:29:11Z

3

You don't need extra variables, since your array is 0-based indexed, you can just use the key. Also you have to change your logic a bit, so that you get your expected output, e.g.

foreach($sample_array as $key => $sample_array_value){

    echo $sample_array_value . "<br />";

    if(($key + 1) % 2 == 0 && ($key + 1) % 3 == 0)
        echo "<br>Separator 2 <br />Separator 3<br /><br />";
    elseif(($key + 1) % 2 == 0)
        echo "<br>Separator 2 <br /><br />";
    elseif(($key + 1) % 3 == 0)
        echo "<br>Separator 3 <br /><br />";

}

output:

boom 1
boom 2

Separator 2 

boom 3

Separator 3 

boom 4

Separator 2 

boom 5
boom 6

Separator 2 
Separator 3

boom 7

answered Jul 12, 2015 at 13:29

Rizier123

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4 Comments

Joel Enanod Jr Over a year ago

how can I use that without $key?, Cause in using mysql just like this foreach(mysql_fetch_array($query) as $get){}

Rizier123 Over a year ago

@JoelEnanodJr Then initialize a variable before the foreach loop, e.g. $count = 0; and increment it at the end of the foreach loop, e.g. $count++;

Joel Enanod Jr Over a year ago

Thank you sir @Rizier123, Even I don't Understand your code It solved my problem.. Im noob in loop hehe thanks much... by the way what's the meaning of e.g.?

Rizier123 Over a year ago

@JoelEnanodJr You're welcome. (e.g. means something like: "for example")

quadrillion · Accepted Answer · 2015-07-12 16:03:16Z

You're suppose to check for 2nd and 3rd outside the if that implements the boom. since you also want the separator to be done after the boom, then bring it down.

$sample_array = array('boom 1','boom 2','boom 3','boom 4','boom 5','boom 6','boom 7');

                        $separator2 = 0;
                        $separator3 = 0;
                        $count = 1;
                        foreach($sample_array as $sample_array_value){
                            echo $sample_array_value."<br />";
                            if($count % 3 == 0)
                            {
                                echo "Separator 3 <br />";
                            }
                            if($count % 2 == 0)
                            {
                                echo "Separator 2 <br /><br />";
                            }
                            $count++;

                        }

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