Trouble writing results in a csv file - php

Question

I've written a script in php to fetch links and write them in a csv file from the main page of wikipedia. The script does fetch the links accordingly. However, I can't write the populated results in a csv file. When I execute my script, It does nothing, no error either. Any help will be highly appreciated.
My try so far:
<?php
include "simple_html_dom.php";
$url = "https://en.wikipedia.org/wiki/Main_Page";
function fetch_content($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
$htmlContent = curl_exec($ch);
curl_close($ch);
$dom = new simple_html_dom();
$dom->load($htmlContent);
$links = array();
foreach ($dom->find('a') as $link) {
$links[]= $link->href . '<br>';
}
return implode("\n", $links);
$file = fopen("itemfile.csv","w");
foreach ($links as $item) {
fputcsv($file,$item);
}
fclose($file);
}
fetch_content($url);
?>

Answer 1

1.You are using return in your function, that's why nothing gets written in the file as code stops executing after that.
2.Simplified your logic with below code:-
$file = fopen("itemfile.csv","w");
foreach ($dom->find('a') as $link) {
fputcsv($file,array($link->href));
}
fclose($file);
So the full code needs to be:-
<?php
//comment these two lines when script started working properly
error_reporting(E_ALL);
ini_set('display_errors',1); // 2 lines are for Checking and displaying all errors
include "simple_html_dom.php";
$url = "https://en.wikipedia.org/wiki/Main_Page";
function fetch_content($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
$htmlContent = curl_exec($ch);
curl_close($ch);
$dom = new simple_html_dom();
$dom->load($htmlContent);
$links = array();
$file = fopen("itemfile.csv","w");
foreach ($dom->find('a') as $link) {
fputcsv($file,array($link->href));
}
fclose($file);
}
fetch_content($url);
?>

Answer 2

The reason the file does not get written is because you return out of the function before that code can even be executed.