SplFileInfo::openFile()

(PHP 5 >= 5.1.2, PHP 7)

Gets an SplFileObject object for the file

说明

publicSplFileInfo::openFile([string $open_mode= "r"[,bool $use_include_path= FALSE[,resource $context= NULL]]]): SplFileObject

Creates an SplFileObjectobject of the file. This is useful because SplFileObject contains additional methods for manipulating the file whereas SplFileInfo is only useful for gaining information, like whether the file is writable.

参数

$open_mode

The mode for opening the file. See the fopen() documentation for descriptions of possible modes. The default is read only.

$use_include_path

值设为TRUE时,也会在include_path搜索文件名。

$context

上下文（context）的说明请参考手册中的上下文（context）章节.

返回值

The opened file as an SplFileObjectobject.

错误／异常

A RuntimeException if the file cannot be opened(e.g. insufficient access rights).

范例

SplFileInfo::openFile() example

<?php
$fileinfo = new SplFileInfo('/tmp/foo.txt');
if ($fileinfo->isWritable()) {
    $fileobj = $fileinfo->openFile('a');
    $fileobj->fwrite("appended this sample text");
}
?>

参见

• SplFileObject
• stream_context_create()创建资源流上下文
• fopen()打开文件或者 URL