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 maxMemory is negative, only memory will be used. If maxMemory 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

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.

参见