Logic issue in PHP -

ok, tested follows , i'll let know discovered:

echo ('-1' < 0) ? 'true' : 'false'; // echo "true" echo ('1' > 0) ? 'true' : 'false'; // echo "true" # notice '-1' , '1' strings 

now let's take array, coming database after filtering result in order rows uid = 1.

$this->a = array(     [0] => array(         'uid' => '1',         'pid' => '91',         'amount' => '-1'     ),     [1] => array(         'uid' => '1',         'pid' => '92',         'amount' => '1'     ),     [2] => array(         'uid' => '1',         'pid' => '93',         'amount' => '1'     ) ); 

now want create function posamount($pid) returns true if 'amount' > 0 or false if 'amount' < 0. (notice: amount = 0 don't care). i'd write similar function called negamount($pid) returns exactely opposite of first. i'd like, now, introduce twin functions:

public function posamount($pid) {     foreach ($this->a $a)     {         if (count($this->a) == 0) { return false; }         return ($a['pid'] == $pid , $a['amount'] > 0) ? true : false;     } }  public function negamount($pid) {     foreach ($this->a $a)     {          if (count($this->a) == 0) { return false; }         return ($a['pid'] == $pid , $a['amount'] < 0) ? true : false;     } } 

the cool fact that, regarding first array (which, checked var_dump() keeps nature trough entire script):

$istance->negamount(91); // returns true, expected $istance->posamount(92); // returns false, not expected. # why god wants me mad? 

the problem returning on first iteration of foreach loop. should rewrite functions this:

public function negamount($pid) {     if (count($this->a) == 0) { return false; }     foreach ($this->a $a) {         if ($a['pid'] == $pid) {             if ($a['amount'] < 0) {                 return true;             }         }     }     return false; }  public function posamount($pid) {     if (count($this->a) == 0) { return false; }     foreach ($this->a $a) {         if ($a['pid'] == $pid) {             if ($a['amount'] > 0) {                 return true;             }         }     }     return false; }