Retry function when string not found - php

Question

I have a function that scrapes data using a list of proxies with curl. It selects a random proxy each time the function is called. However sometimes a proxy can fail or timeout.
When the connection fails/timeout I would like to repeat the function up to 3 times until the data is returned.
The way I would like to test if the connection is bad is by checking if a string exists in the output like this:
$check = stripos($page,'string_to_check');
if($check > 0){
return $page; //String found. Return scraped data.
}
else {
//String not found. Loop the script
}
How would I get the whole function code to repeat if the string doesn't exist?

Answer 1

$max_tries = 3;
$success = false;
//try 3 times
for( $i = 0; $i < $max_tries; $i++ ) {
$page = your_scrape_function();
$check = stripos($page,'string_to_check');
if($check > 0){
$success = true;
break; //String found. Break loop.
}
}
// double check that the string was actually found and you didn't just exceed $max_tries
if( ! $success ) {
die('Error: String not found or scrape unsuccessful.');
}