php fopen() function
Translation results：
UK[ˈəʊpən] US[ˈoʊpən]
adj.Open, open; open, public; frank; room for discussion
vt.& vi. (Open) to open; to start; to unfold; to start
n.Open; outdoors, in the wild; in the open
vi.To open; to display, to appear
vt.Open; Open; open for business; unveil (a building)
Third person singular: opens Present participle: opening Past tense: opened Past participle: opened
php fopen() functionsyntax
Function:Open a file or URL.
Syntax: fopen(filename,mode,include_path,context)
Parameters:
| Parameter | Description |
| filename | Required. Specifies the file or URL to open. |
| mode | Required. Specifies the type of access required to this file/stream. |
| include_path | Optional. If you also need to retrieve files in include_path, you can set this parameter to 1 or TRUE. |
| context | Optional. Specifies the environment for a file handle. Context is a set of options that can modify the behavior of the stream. |
Description: fopen() binds the name resource specified by filename to a stream. If filename is of the form "scheme://...", it is treated as a URL and PHP will search for a protocol handler (also called a wrapper protocol) to handle the scheme. If the wrapper protocol has not been registered for the protocol, PHP will emit a message to help check for potential problems in the script and proceed with filename as if it were a normal filename. If PHP thinks that filename specifies a local file, it will try to open a stream on that file. The file must be accessible to PHP, so you need to confirm that the file access permissions allow this access. If safe mode or open_basedir is activated further restrictions apply. If PHP thinks that filename specifies a registered protocol, and the protocol is registered as a network URL, PHP will check and confirm that allow_url_fopen has been activated. If it is closed, PHP will issue a warning and the call to fopen will fail.
php fopen() functionexample
<?php
$file = fopen("./test.txt","r");
?>