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Opens a file


eio_open

(PECL eio >= 0.0.1dev)

eio_openOpens a file

Description

resource eio_open ( string $path , int $flags , int $mode , int $pri , callable $callback [, mixed $data = NULL ] )

eio_open() opens file specified by path in access mode mode with

Parameters

path

Path of the file to be opened.

Warning

In some SAPIs(e.g. PHP-FPM) it could fail, if you don't specify full path.

flags

One of EIO_O_* constants, or their combinations. EIO_O_* constants have the same meaning, as their corresponding O_* counterparts defined in fnctl.h C header file. Default is EIO_O_RDWR.

mode

One of EIO_S_I* constants, or their combination (via bitwise OR operator). The constants have the same meaning as their S_I* counterparts defined in » sys/stat.h C header file. Required, if a file is created. Otherwise ignored.

pri

The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, pri internally is set to EIO_PRI_DEFAULT.

callback

callback function is called when the request is done. It should match the following prototype:

void callback(mixed $data, int $result[, resource $req]);
data

is custom data passed to the request.

result

request-specific result value; basically, the value returned by corresponding system call.

req

is optional request resource which can be used with functions like eio_get_last_error()

data

Arbitrary variable passed to callback.

Return Values

eio_open() returns file descriptor in result argument of callback on success; otherwise, result is equal to -1.

Examples

Example #1 eio_open() example

<?php
$temp_filename 
"eio-temp-file.tmp";

/* Is called when eio_close() finishes */
function my_close_cb($data$result) {
 
// Zero indicates success
    
var_dump($result == 0);
 @
unlink($data);
}

/* Is called when eio_open() finishes */
function my_file_opened_callback($data$result) {
 
// $result should contain the file descriptor
    
var_dump($result 0);

    if (
$result 0) {
  
// Close the file
        
eio_close($resultEIO_PRI_DEFAULT"my_close_cb"$data);
        
eio_event_loop();
    }
}

// Create new file for reading and writing
// Deny group and others to do anything with that file
eio_open($temp_filenameEIO_O_CREAT EIO_O_RDWREIO_S_IRUSR EIO_S_IWUSR,
  
EIO_PRI_DEFAULT"my_file_opened_callback"$temp_filename);
eio_event_loop();
?>

The above example will output something similar to:

 bool(true) bool(true) 

See Also

  • eio_mknod


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