stream_resolve_include_path()

(PHP 5 >= 5.3.2, PHP 7)

Resolve filename against the include path

说明

Resolve$filenameagainst the include path according to the same rules asfopen()/include.

参数

The filename to resolve.

返回值

Returns astringcontaining the resolved absolute filename,或者在失败时返回FALSE.

范例

Example #1stream_resolve_include_path()example

Basic usage example.

以上例程的输出类似于：

string(22) "/var/www/html/test.php"

In case you're running a version of PHP that doesn't have this function...
if (!function_exists('stream_resolve_include_path')) {
  /**
   * Resolve filename against the include path.
   *
   * stream_resolve_include_path was introduced in PHP 5.3.2. This is kinda a PHP_Compat layer for those not using that version.
   *
   * @param Integer $length
   * @return String
   * @access public
   */
  function stream_resolve_include_path($filename)
  {
    $paths = PATH_SEPARATOR == ':' ?
      preg_split('#(?
It really behaves like `include` and will only resolve the filename against the include-path, if the path is relative. It makes not much sense to resolve already absolute pathnames anyway.
This seems to be a great alternative to file_exists.
if( file_exists(__DIR__.'/som-file.php') )
Goes way slower than:
if( stream_resolve_inlcude_path(__DIR__.'/som-file.php') !== false)
 

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