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Allow passing an empty tag set to wp_set_post_tags() so all tags can be removed from a post. see #3723
git-svn-id: http://svn.automattic.com/wordpress/trunk@5243 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@ -800,6 +800,8 @@ function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
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// prevent warnings for unintialized variables
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$tag_ids = array();
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if ( empty($tags) )
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$tags = array();
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$tags = (is_array($tags)) ? $tags : explode( ',', $tags );
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foreach ( $tags as $tag ) {
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@ -811,7 +813,7 @@ function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
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$tag_ids[] = $tag_id;
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}
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if ( empty($tag_ids) )
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if ( empty($tag_ids) && ( !empty($tags) || $append ) )
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return false;
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$tag_ids = array_unique( $tag_ids );
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