Insert variable in array if not present

Question

I would like to insert variables in an array. I am using in_array() function to check if a value has already been inserted and array_push to append elements to the array.

Working example

<?php 
$var1="cat";
$var2="dog";
$var3="gepp";
$var4="frigor";
$var5="dog";
$var6='cat';

$array1=array($var1,$var2,$var3,$var4,$var5,$var6);

$ya=array();

for($i=0;$i<=count($ya);$i++)
{
 if (in_array($array1[$i],$ya,true))
 {          
    echo $i . " : Yess<br>";
 }
 else
 { 
    array_push($ya, $array1[$i]);
    echo $i . " : Noo<br>";
 }
}

echo "<br>\n";
print_r($array1);
echo "<br>\n";
print_r($ya);
?>

The output is:

0 : Noo 1 : Noo 2 : Noo 3 : Noo 4 : Yess

Array ( [0] => cat [1] => dog [2] => gepp [3] => frigor [4] => dog [5] => cat )
Array ( [0] => cat [1] => dog [2] => gepp [3] => frigor )

Not working example

In the following code values are saved from the label tag of an xml.

$array = array();
foreach($mypix->result as $pixinfo):
    echo " Result<br>\n   ";
    foreach($pixinfo->row as $row): 
        $label=$row->label;         
        if (in_array($label,$array,true))
        {           
            echo "Yess<br>";
        }
        else
        { 
            array_push($array, $label);
            echo "No<br>";
        }
        echo "[NEXT]<br>\n";
    endforeach;
endforeach;

The xml's structure is as follows:

<result date="2014-05-05"> 
  <row> 
    <label>1.1</label> 
    <nb_visits>4</nb_visits> 
  </row> 
</result> 
<result date="2014-05-06"/> 
<result date="2014-05-08"> 
  <row> 
    <label>Custom Variable value not defined</label> 
    <nb_visits>115</nb_visits> 
    <nb_actions>261</nb_actions> 
  </row> 
  <row> 
    <label>Commedia</label> 
    <nb_visits>26</nb_visits>
    <nb_actions>39</nb_actions> 
  </row> 
[...]
</result>

The problem is that values are inserted even if they are already present in the array. Do you guys have any advice? What's wrong with the in_array command?

Edit

Here is the output of var_dump($array);

array(441){
[0]=> object(SimpleXMLElement)#9 (1) { [0]=> string(3) "1.1" } 
[1]=> object(SimpleXMLElement)#8 (1) { [0]=> string(3) "1.2" } 
[2]=> object(SimpleXMLElement)#10 (1) { [0]=> string(3) "1.1" } 
[3]=> object(SimpleXMLElement)#11 (1) { [0]=> string(3) "1.1" } 
[4]=> object(SimpleXMLElement)#12 (1) { [0]=> string(33) "Custom Variable value not defined" }

I would use array_diff to locate the differences - php.net/manual/en/function.array-diff.php — Jay Blanchard
– Jay Blanchard, Commented May 23, 2014 at 13:24

turson · Accepted Answer · 2014-05-23 13:24:58Z

1

use array_unique to cut reapating variables or array_diff to find difference between 2 arrays

answered May 23, 2014 at 13:24

turson

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2 Comments

Barmar Over a year ago

The original array is a multidimensional array of objects, and he's just extracting one field of the objects. So array_diff() can't be used.

UserK Over a year ago

With $result = array_unique($array); I am able to get the correct count of different values inserted but the resulting array has blank entries. The problem remains...what's wrong with in_array() command?

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