Phar::offsetExists()

(PHP 5 >= 5.3.0, PHP 7, PECL phar >= 1.0.0)

Determines whether a file exists in the phar

说明

publicPhar::offsetExists(string $offset): bool

This is an implementation of the ArrayAccess interface allowing direct manipulation of the contents of a Phar archive using array access brackets.

offsetExists()is called whenever isset() is called.

参数

$offset

The filename(relative path)to look for in a Phar.

返回值

Returns TRUE if the file exists within the phar, or FALSE if not.

范例

A Phar::offsetExists() example

<?php
$p = new Phar(dirname(__FILE__) . '/my.phar', 0, 'my.phar');
$p['firstfile.txt'] = 'first file';
$p['secondfile.txt'] = 'second file';
// the next set of lines call offsetExists() indirectly
var_dump(isset($p['firstfile.txt']));
var_dump(isset($p['nothere.txt']));
?>

以上例程会输出：

bool(true)
bool(false)

参见

• Phar::offsetGet() Gets a PharFileInfo object for a specific file
• Phar::offsetSet() Set the contents of an internal file to those of an external file
• Phar::offsetUnset() Remove a file from a phar