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In PHP 5.0.0, is_a() became deprecated in favour of the instanceof operator. Calling is_a() would result in an E_STRICT warning.

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In PHP 5.3.0, `is_a()` is no longer deprecated, and will therefore no longer throw `E_STRICT` warnings.

To avoid warnings in PHP < 5.3.0, convert all `is_a()` calls to `$var instanceof WP_Class` calls.

`instanceof` does not throw any error if the variable being tested is not an object, it simply returns `false`.

Props markoheijnen, wonderboymusic.
Fixes #25672.


git-svn-id: https://develop.svn.wordpress.org/trunk@31188 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Scott Taylor
2015-01-16 01:05:52 +00:00
parent 102fb4ac5c
commit 5acc6bdb58
24 changed files with 76 additions and 68 deletions
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src/wp-includes/compat.php
+2 -2
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@@ -65,7 +65,7 @@ if ( !function_exists('json_encode') ) {
function json_encode( $string ) {
global $wp_json;
if ( !is_a($wp_json, 'Services_JSON') ) {
if ( ! ( $wp_json instanceof Services_JSON ) ) {
require_once( ABSPATH . WPINC . '/class-json.php' );
$wp_json = new Services_JSON();
}
@@ -78,7 +78,7 @@ if ( !function_exists('json_decode') ) {
function json_decode( $string, $assoc_array = false ) {
global $wp_json;
if ( !is_a($wp_json, 'Services_JSON') ) {
if ( ! ($wp_json instanceof Services_JSON ) ) {
require_once( ABSPATH . WPINC . '/class-json.php' );
$wp_json = new Services_JSON();
}