[wp-trac] [WordPress Trac] #44532: Extreme memory leak related to wp_is_stream in wp-includes/functions.php in WordPress 4.9.7

[WordPress Trac]

#44532: Extreme memory leak related to wp_is_stream in wp-includes/functions.php in
WordPress 4.9.7
--------------------------+---------------------
 Reporter:  timbowesohft  |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  high          |   Milestone:  4.9.8
Component:  Media         |     Version:  4.9.7
 Severity:  major         |  Resolution:
 Keywords:  needs-patch   |     Focuses:
--------------------------+---------------------

Comment (by ddenev):

 Replying to [comment:9 sebastien@…]:
 > Hello
 >
 > On this version of WordPress (the dev one):
 > https://github.com/WordPress/WordPress
 >
 > the
 > {{{
 > wp_is_stream()
 > }}}
 >
 > function is quite different...
 >
 > {{{#!php
 > <?php
 > /**
 >  * Test if a given path is a stream URL
 >  *
 >  * @since 3.5.0
 >  *
 >  * @param string $path The resource path or URL.
 >  * @return bool True if the path is a stream URL.
 >  */
 > function wp_is_stream( $path ) {
 >       $wrappers    = stream_get_wrappers();
 >       $wrappers    = array_map( 'preg_quote', $wrappers );
 >       $wrappers_re = '(' . join( '|', $wrappers ) . ')';
 >
 >       return preg_match( "!^$wrappers_re://!", $path ) === 1;
 > }
 > }}}
 >
 > is it normal?
 > is this change fix the problem ?

 Nope, this does not fix the memory explosion problem. At least for me on
 Win7 64-bit. The only fix that works so far is the one suggested by
 "bezpeka.com" here - https://wordpress.org/support/topic/wp_is_stream-
 crashing-the-server/, although it's rather a temporary hack.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44532#comment:12>
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