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WPDB: Fix a PHP notice when `AUTH_SALT` is undefined. 

In `wpdb::placeholder_escape()`, the key for `hash_hmac()` falls back to `rand()` when `AUTH_SALT` is undefined. `hash_hmac()` requires the key to be a string, however, so we need to cast it as such.

Props mkomar.
Fixes #42401.



git-svn-id: https://develop.svn.wordpress.org/trunk@42119 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Gary Pendergast 2017-11-07 00:29:26 +00:00
parent b23d590bf2
commit f7fbbcba0d
1 changed files with 1 additions and 1 deletions
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2
src/wp-includes/wp-db.php
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@ -1946,7 +1946,7 @@ class wpdb {
// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
$algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
// Old WP installs may not have AUTH_SALT defined.
$salt = defined( 'AUTH_SALT' ) ? AUTH_SALT : rand();
$salt = defined( 'AUTH_SALT' ) ? AUTH_SALT : (string) rand();
$placeholder = '{' . hash_hmac( $algo, uniqid( $salt, true ), $salt ) . '}';
}