Phar::offsetExists

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

Phar::offsetExists — determines whether a file exists in the phar

说明

public bool Phar::offsetExists ( string $offset )

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() 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