php file_get_contents 处理错误的好方法
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file_get_contents good way to handle errors
提问by Hashey100
I am trying to error handle the file_get_contents method so even if the user enters an incorrect website it will echo an error message rather then the unprofessional
我正在尝试错误处理 file_get_contents 方法，因此即使用户输入了错误的网站，它也会回显错误消息而不是不专业的
Warning: file_get_contents(sidiowdiowjdiso): failed to open stream: No such file or directory in C:\xampp\htdocs\test.php on line 6
警告：file_get_contents(sidiowdiowjdiso)：无法打开流：第 6 行 C:\xampp\htdocs\test.php 中没有这样的文件或目录
I thought if i make a try and catch it will be able to catch the error but that did not work.
我想如果我尝试并捕获它，它将能够捕获错误，但这不起作用。
try
{
$json = file_get_contents("sidiowdiowjdiso", true); //getting the file content
}
catch (Exception $e)
{
throw new Exception( 'Something really gone wrong', 0, $e);
}
回答by Andrey Volk
Try cURL with curl_errorinstead of file_get_contents:
尝试使用curl_error而不是 file_get_contents 的cURL ：
<?php
// Create a curl handle to a non-existing location
$ch = curl_init('http://404.php.net/');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$json = '';
if( ($json = curl_exec($ch) ) === false)
{
echo 'Curl error: ' . curl_error($ch);
}
else
{
echo 'Operation completed without any errors';
}
// Close handle
curl_close($ch);
?>
回答by m4t1t0
file_get_contentsdo not throw an exception in error, instead it returns false, so you can check if the returned value is false:
file_get_contents不要在错误中抛出异常，而是返回 false，因此您可以检查返回值是否为 false：
$json = file_get_contents("sidiowdiowjdiso", true);
if ($json === false) {
//There is an error opening the file
}
This way you still get the warning, if you want to remove it, you need to put an @in front of file_get_contents. (This is considered a bad practice)
这样你仍然会收到警告，如果你想删除它，你需要@在file_get_contents. （这被认为是一种不好的做法）
$json = @file_get_contents("sidiowdiowjdiso", true);
回答by chrisd84
You could do any of the following:
您可以执行以下任一操作：
Set a global error handler (that will handle WARNINGs as well), for all of your unhandled exceptions: http://php.net/manual/en/function.set-error-handler.php
为所有未处理的异常设置全局错误处理程序（也将处理警告）：http://php.net/manual/en/function.set-error-handler.php
Or by checking the return value of the file_get_contents function (with the === operator, as it will return boolean false on failure), and then manage the error message accordingly, and disable the error reporting on the function by prepending a "@" like so:
或者通过检查 file_get_contents 函数的返回值（使用 === 运算符，因为它会在失败时返回布尔值 false），然后相应地管理错误消息，并通过添加“@”来禁用函数的错误报告像这样：
$json = @file_get_contents("file", true);
if($json === false) {
// error handling
} else {
// do something with $json
}
回答by Rubin Porwal
As a solution to your problem please try executing following code snippet
作为您问题的解决方案，请尝试执行以下代码片段
try
{
$json = @file_get_contents("sidiowdiowjdiso", true); //getting the file content
if($json==false)
{
throw new Exception( 'Something really gone wrong');
}
}
catch (Exception $e)
{
echo $e->getMessage();
}
