(PHP >= 5.3) If filename is a directory, a LogicException will be thrown: "Cannot use SplFileObject with directories"
SplFileObject::__construct
(PHP 5 >= 5.1.0)
SplFileObject::__construct — Construct a new file object.
說明
public SplFileObject::__construct
( string
$filename
[, string $open_mode = "r"
[, bool $use_include_path = false
[, resource $context
]]] )Construct a new file object.
參數
-
filename -
The file to read.
Tip如果「fopen wrappers」已經被啟用，則在本函式中可以把 URL 作為檔案名來使用。請參閱 fopen() 函式來獲取如何指定文件名的詳情以及支援 URL 協定列表：Supported Protocols and Wrappers。
-
open_mode -
The mode in which to open the file. See fopen() for a list of allowed modes.
-
use_include_path -
Whether to search in the include_path for
filename. -
context -
A valid context resource created with stream_context_create().
回傳值
無回傳值。
錯誤/例外
Throws a RuntimeException if the filename cannot be opened.
範例
Example #1 SplFileObject::__construct() example
This example opens the current file and iterates over its contents line by line.
<?php
$file = new SplFileObject(__FILE__);
foreach ($file as $line_num => $line) {
echo "Line $line_num is $line";
}
?>
上例的輸出類似於：
Line 0 is <?php
Line 1 is $file = new SplFileObject(__FILE__);
Line 2 is foreach ($file as $line_num => $line) {
Line 3 is echo "Line $line_num is $line";
Line 4 is }
Line 5 is ?>
add a note
User Contributed Notes 2 notes
majna ¶
9 years ago
KEINOS at blog.keinos.com ¶
6 years ago
When using URL as a filename, such as "http://..." or "php://stdin", and also have the fopen wappers on, and you get a 'RuntimeException' error, try using "NoRewindIterator" class to a SplFileObject instance.
<?php
$url = 'http://sample.com/data.csv';
$file = new NoRewindIterator( new SplFileObject( $url ) );
foreach ($file as $line_num => $line) {
echo "Line $line_num is $line";
}
?>
While opening a file, a rewind method will be called, but these URL iterators cannot be rewind, so you'll get a "Fatal error: Uncaught exception 'RuntimeException' with message 'Cannot rewind file ...'" error.
