To just pull out the stock price, you would want to do something like this:
Search your string for "Apple" and save $position + 5 (length of Apple). Search directly after $position, one character at a time, for the first character that is_numeric and add that to a string, $stock_val. Continue adding all subsequent characters until you find one that !is_numeric. Here is my clunky code:
$position = strpos(strtolower($str), "apple") + strlen("apple");
$temp_str = substr($str, $position);
$stock_val = "";
do {
$char = substr($temp_str, 0, 1); //Take first char of $temp_str
$temp_str = substr($temp_str, 1); //Remove that char from $temp_str
$is_acceptable = (is_numeric($char) || $char == "." || $char == ",");
if($is_acceptable) { //If the char is_numeric, add it to $stock_val
$stock_val .= $char;
}
if(!$is_acceptable && $stock_val != "") {
break; //If the char is NOT numeric AND $stock_val
} //already has characters, break.
} while(strlen($temp_str) > 0); //Repeat while there are still characters