(PHP 5 >= 5.1.2, PHP 7, PHP 8)
SplTempFileObject::__construct — Construct a new temporary file object
$maxMemory = 2 * 1024 * 1024
)Construct a new temporary file object.
maxMemoryThe 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.
没有返回值。
Throws a RuntimeException if an error occurs.
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.
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.