SplTempFileObject::__construct
(PHP 5 >= 5.1.2, PHP 7, PHP 8)
SplTempFileObject::__construct — Construct a new temporary file object
说明
public SplTempFileObject::__construct(int
$maxMemory = 2 * 1024 * 1024)Construct a new temporary file object.
参数
-
maxMemory -
The maximum amount of memory (in bytes, default is 2 MB) for the temporary file to use. If the temporary file exceeds this size, it will be moved to a file in the system's temp directory.
If
maxMemoryis negative, only memory will be used. IfmaxMemoryis zero, no memory will be used.
错误／异常
Throws a RuntimeException if an error occurs.
范例
示例 #1 SplTempFileObject() example
This example writes a temporary file in memory which can be written to and read from.
<?php
$temp = new SplTempFileObject();
$temp->fwrite("This is the first line\n");
$temp->fwrite("And this is the second.\n");
echo "Written " . $temp->ftell() . " bytes to temporary file.\n\n";
// Rewind and read what was written
$temp->rewind();
foreach ($temp as $line) {
echo $line;
}
?>
以上例程的输出类似于：
Written 47 bytes to temporary file. This is the first line And this is the second.
add a note
User Contributed Notes 1 note
larry dot laski at gmail dot com ¶
7 years ago
Noting that when the tmp file exceeds memory limitations and is written to the system temp directory, it is deleted upon completion of the script it was initially created in. At least that is what I have seen and wanted to document for others since it wasn't clear.
备份地址：http://www.lvesu.com/blog/php/spltempfileobject.construct.php