Detailed explanation of how PHP determines whether it is connected to the Internet

This article mainly introduces the method of PHP to determine whether it is connected to the Internet. It uses PHP to determine whether it can open the Baidu page to determine whether it is connected to the Internet. Friends who need it can refer to it.

The specific implementation method is as follows:

First write a function

function varify_url($url){ 
$check = @fopen($url,"r"); 
if($check){ 
 $status = true; 
}else{ 
 $status = false; 
} 
return $status; 
}

Then call it directly where needed

$url = "http://www.baidu.com"; 
if(varify_url($url)){ 
 echo "<p>Congratulation ! Your URL <a href=$url>$url</a> : is <b>valid </b></p>"; 
}else{ 
 echo "<p>Error ! Your URL : <a href=$url>$url</a> is <b>invalid </b></p>"; 
}

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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