Php/docs/phar.offsetexists
Phar::offsetExists
(PHP 5 >= 5.3.0, PHP 7, PECL phar >= 1.0.0)
Phar::offsetExists — Determines whether a file exists in the phar
说明
public Phar::offsetExists
( string $offset
) : bool
This is an implementation of the ArrayAccess interface allowing direct manipulation of the contents of a Phar archive using array access brackets.
offsetExists() is called whenever isset() is called.
参数
offset- The filename (relative path) to look for in a Phar.
返回值
Returns true if the file exists within the phar, or false if not.
范例
Example #1 A Phar::offsetExists() example
<?php$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() indirectlyvar_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
