Php/docs/spltempfileobject.construct

• PHP Manual
• SplTempFileObject
• Construct a new temporary file object

SplTempFileObject::__construct

(PHP 5 >= 5.1.2, PHP 7)

SplTempFileObject::__construct — Construct a new temporary file object

说明

public SplTempFileObject::__construct ([ int $max_memory ] )

Construct a new temporary file object.

参数

max_memory

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 max_memory is negative, only memory will be used. If max_memory is zero, no memory will be used.

返回值

没有返回值。

错误／异常

Throws a RuntimeException if an error occurs.

范例

Example #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.

参见

• SplFileObject
• PHP input/output streams (for php://temp and php://memory)