用file_get_contents获取字符串有关问题

用file_get_contents获取字符串问题
我有两个页面
a.php

PHP code

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<?php echo '1';
?>

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PHP code

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$opts = array('http'=>array('method'=>"GET",'timeout'=>3,));
$context = stream_context_create($opts);
$open =file_get_contents("http://127.0.0.1/a.php", false, $context);
if($open=='1'){
echo '2'
}

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