PHP Forum

**max21b** · 09-28-2011, 10:25 PM

Hello Everyone, I been teaching myself PHP off and on for nearly five months after work .. that's what makes the easy PHP hard to learn. Anyway, I been working with this code for days and nothing I tried will output duplicates to screen. Somewhere during the process I got hook on doing it with a *loop*. I found tons of working code while googling but not one of them worked for multi dimensional array and the tutorials don't seem to go into details like it does for everything else PHP. Maybe I just plain slow. Anyway, I hope someone can help me solve this problem. If not, you guys and gals are stuck with me anyway

because my PHP forum quest is over and I know for a fact that Google can't find/list everything.

Thanks in advance for any help.

btw: The default code font being used is blinding.

Code:

<html><head><title></title></head>
<body>

<?php

$_ARRAY=array(array("Joye",1111,"Cake"),        //  MULTIDIMENSIONAL ARRAY:
              array("Earl",7777,"Rake"),
              array("Joye",2222,"Pear"),
              array("Ruth",7777,"Rose"),
              array("Joye",3333,"Cake"),
              array("Wong",7777,"Cake"),  );
?>

<pre>
<?php

echo "Printing All Elements with a Loop::";

echo "<ol>";
    for ($row = 0; $row < 6; $row++) {                            #  6 row
          echo "<li><b>         r-$row</b>";                    #  header
          echo "<ul>";

            for ($col = 0; $col < 3; $col++) {                    #  3 col
                  echo "<li>".$_ARRAY[$row][$col]."</li>"; }    #  print list
    echo "</ul>";
    echo "</li>";
}
echo "</ol>";
## ....................................................
## ....................................................
## ....................................................
echo "Printing All Duplicates using a Loop ... No luck:: :( ";
     echo "\n";
     echo "\n";
echo("Testing:; Manually printing a dupicate number (row1-col2){$_ARRAY[1][2]}");
     echo "\n";

?>
</pre>
</body>
</html>

**NullPointer** · 11:52 PM

PHP Code:


			
<?php

$_ARRAY=array(array("Joye",1111,"Cake"),        //  MULTIDIMENSIONAL ARRAY:

              array("Earl",7777,"Rake"),

              array("Joye",2222,"Pear"),

              array("Ruth",7777,"Rose"),

              array("Joye",3333,"Cake"),

              array("Wong",7777,"Cake"),  );



$exists = array();

$duplicates = array();



foreach($_ARRAY as $row)

{

    foreach($row as $val)

    {

        //if the value exists and it isn't already in the dupcliates array

        if(in_array($val, $exists) && !in_array($val, $duplicates))

            $duplicates[] = $val;

        else

            $exists[] = $val;

    }

}



print_r($duplicates);

?>

Edit:
I can think of at least one way that is a little quicker, but this solution should work for reasonably sized arrays.

**max21b** · 04:50 AM

Thank you NullPointer. It works! I did say all values but suppose I wanted to find duplicates in a single column and output each key and all of it's elements. I been searching and reading so much I'm beginning to sound like the php manual to myself. If I could see an sample of each for numbers and strings anything more should come natural after all of this time I been using functions and php commands that would never work for multidimensional arrays. I found this just hours ago. cmonkey said a mouth full: /tycoontalk-12202-searching-in-multi-dimensional-array Now I understand. [0] => Earl => 7777 => Rake [0] => Ruth => 7777 => Rose [0] => Wong => 7777 => Cake "I can think of at lease one way that is a little quicker," After I get pass knowing how to loop Multi-D, I'll build up my nerve again and ask you HOW someday

What a Great Day! Thanks again the values posted is three lines. I can't use links, etc for 10 days.