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.

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

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

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User Contributed Notes 1 note

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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.

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官方地址：https://www.php.net/manual/en/spltempfileobject.construct.php

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SplTempFileObject::__construct

说明

参数

错误／异常

范例

参见

User Contributed Notes 1 note