mysql insert inside foreach loop, cron not working - php

Question

This code works if i run in a browser. When i run the script via a cron, it doesn't get through the array and stops halfway? Why is this?
$url_array = array("eur-gbp","eur-aud","usd-chf","eur-usd","eur-jpy","gbp-jpy","eur-cad","eur-chf","usd-cad","usd-jpy","cad-chf","cad-jpy","gbp-usd","aud-usd","gbp-chf","chf-jpy","gbp-cad","aud-cad","aud-chf","aud-jpy","aud-nzd","eur-nzd","gbp-aud","gbp-nzd","nzd-chf","nzd-usd","nzd-cad","nzd-jpy");
$option_array = array(1,2,3,4,5,6,7);
$type_array = array(1,2,3,4,5,6);
foreach($url_array as $url_type) {
//code
foreach($option_array as $option) {
//code
foreach($duration_array as $duration) {
//code
foreach($type_array as $type) {
//mysql insert
$sql = "SELECT * FROM `data_analysis` WHERE date_time='".$date."' AND type='".$url_type."' LIMIT 1";
$query = $this->db->query($sql);
$result = $query->fetch_assoc();
if($result){
$sql = "UPDATE `data_analysis` SET value='".$percentage."', price_change='".$price."', parent='1' WHERE date_time='".$date."' AND type='".$url_type."'";
} else {
$sql = "INSERT IGNORE INTO `data_analysis` (date_time,value,price_change,type,parent) VALUES ('".$date."','".$percentage."','".$price."','".$url_type."','1')";
}
}
}
}
}
This isn't the exact code as it is too long to post but similar. The code works perfectly in the browser?? running via cron it stops at gbp-jpy? Why is this?
Is there a mysql query limit?

Answer 1

Add a unique index on (type, date_time) to the table. Then combine your two queries into 1. Also, use a prepared statement.
$stmt = $this->db->prepare("
INSERT INTO data_analysis (date_time, value, price_change, type, parent)
VALUES (?, ?, ?, ?, '1')
ON DUPLICATE KEY UPDATE value = VALUES(value), price_change = VALUES(price_change), parent = VALUES(parent)");
$stmt->bind_param("ssss", $date, $percentage, $price, $url_type);
foreach($url_array as $url_type) {
//code
foreach($option_array as $option) {
//code
foreach($duration_array as $duration) {
//code
foreach($type_array as $type) {
//mysql insert
$stmt->execute();
}
}
}
}