How to close files opened by fopen in php

The file opened by fopen in php can be closed using the fclose() function. The fclose() function can close an open file pointer and an open file. The syntax format is "fclose(handle)"; Returns true if successful, false otherwise.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Use the fopen() function in PHP to open the file Or URL. If the opening is successful, the file pointer resource is returned; if the opening fails, FALSE is returned.

The open file can be closed using the fclose() function.

The function fclose() can close an open file pointer, returning TRUE if successful and FALSE if failed. The syntax format of the function is as follows:

fclose(resource $handle)

where $handle is the file pointer to be closed. This pointer must be valid and successfully opened through the fopen() or fsockopen() function.

[Example] Use fclose() to close the file.

<?php
    $handle = fopen("http://c.biancheng.net/", "r");
    echo &#39;文件指针关闭之前：&#39;;
    var_dump($handle);
    fclose($handle);
    echo &#39;<br>文件指针关闭之后：&#39;;
    var_dump($handle);
?>

The running results are as follows:

文件指针关闭之前：resource(3) of type (stream)
文件指针关闭之后：resource(3) of type (Unknown)

Note: The resource type is one of the basic types of PHP. Once the resource processing is completed, it must be closed, otherwise some problems may occur. Unexpected error.

Recommended learning: "PHP Video Tutorial"

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