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WPDB: Check that $wpdb->last_result is countable before counting with it.

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`wpdb::get_col()` iterates over `$wpdb->last_result`, which can be a non-countable value, should the preceding query have failed.

Props spacedmonkey, desrosj, pento.

Merges [43934] into trunk.

See #45299.

git-svn-id: https://develop.svn.wordpress.org/trunk@44272 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Jonathan Desrosiers
2018-12-17 18:38:13 +00:00
parent 6e546d482d
commit 5c6cc0f6ce
2 changed files with 101 additions and 7 deletions
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src/wp-includes/wp-db.php
+11 -7
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@@ -2544,8 +2544,10 @@ class wpdb {
$new_array = array();
// Extract the column values
for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) {
$new_array[ $i ] = $this->get_var( null, $x, $i );
if ( $this->last_result ) {
for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) {
$new_array[ $i ] = $this->get_var( null, $x, $i );
}
}
return $new_array;
}
@@ -2585,11 +2587,13 @@ class wpdb {
} elseif ( $output == OBJECT_K ) {
// Return an array of row objects with keys from column 1
// (Duplicates are discarded)
foreach ( $this->last_result as $row ) {
$var_by_ref = get_object_vars( $row );
$key = array_shift( $var_by_ref );
if ( ! isset( $new_array[ $key ] ) ) {
$new_array[ $key ] = $row;
if ( $this->last_result ) {
foreach ( $this->last_result as $row ) {
$var_by_ref = get_object_vars( $row );
$key = array_shift( $var_by_ref );
if ( ! isset( $new_array[ $key ] ) ) {
$new_array[ $key ] = $row;
}
}
}
return $new_array;