array search is not working in php

Question

I am trying to find picid in array but it's not working. When I echo it, nothing appears.

Here is my code

<?php $psql=mysql_query("select * from gallery where userId='$miid'");
$photo1 = array();

while($photo=mysql_fetch_assoc($psql)) { 
  $photo1[]=$photo;
  print_r($photo);
}

foreach($photo1 as $k => $v){
  if($v['picId']==$mipic){
    $pic="uploads/".$v['photo'];
    echo ">>>". $key=array_search($v['picId'],$photo1);
?>

 <a href="eg?next=<?php echo $photo[$k+1];?>">NEXT</a>
 <img src="<?php echo $pic; ?>" width="300px" height="300px">
 <a href="eg?previous=<?php echo $photo[$k-1];?>">PREVIOUS</a>
 <?php
  }
  }?>

Answer 1

array_search is not recursive. $v exists in $photo1, while $v['picId'] only exists in $v.

That makes $key=array_search($v['picId'],$photo1) return false which, when you echo it, will print as nothing.

I am not sure why you are using array_search at all. In order to retrieve the next and previous picId, try this:

<a href="modules/gallery/miloader.php?next=<?php echo $photo1[$k+1]['picId'];?>">NEXT</a>
<img src="<?php echo $pic; ?>" width="300px" height="300px">
<a href="miloader.php?previous=<?php echo $photo1[$k-1]['picId'];?>">PREVIOUS</a>

Beware though that one of the hrefs is modules/gallery/miloader.php while the other is just miloader.php. So unless you actually have two different miloader.php files (one in each of the directories), one of them is wrong.