search array by column value using in array and strpos return line and data
search delimited file array by column strpos in array search tomatos search

<?php
$file='cart-data.txt';
//return delimited file numeric index array and search column return value or full line array
//return single value result as string
$searchVal='Tomatos';
$found='';
if (file_exists($file)) {
 $handle = file_get_contents($file);
$complete=array();
$handle_row = explode("\n", $handle);
$rc=count($handle_row);
$i=0;
foreach ($handle_row as $key => $val) {
$values = explode(';', $val);
 // array search
 if (in_array($searchVal,$values)) { 
  //return row as string uncomment 
//$complete[$i] =$handle_row[$key];
//return row as array
$complete[$i] =$values;
$found='1';	
} 
 // strpos search
 if (!$found) {
 foreach ($values as $k=>$v) {   
  if (strpos($v,$searchVal) !== false){
   //return row array
   $complete[$i] =$values;
   //return that field value only or specify $values['data3'];
   //$complete[$i] =$values[$k];
   } 
   } 
}   
     $i++;
}
}

echo '<pre>';
var_dump($complete); 
echo '</pre>';
exit;;
?>