| 1 | Index: wp-includes/functions.php |
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| 2 | =================================================================== |
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| 3 | --- wp-includes/functions.php (revision 13947) |
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| 4 | +++ wp-includes/functions.php (working copy) |
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| 5 | @@ -2209,7 +2209,7 @@ |
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| 6 | $name = ''; |
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| 7 | |
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| 8 | // Increment the file number until we have a unique file to save in $dir. Use $override['unique_filename_callback'] if supplied. |
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| 9 | - if ( $unique_filename_callback && function_exists( $unique_filename_callback ) ) { |
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| 10 | + if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) { |
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| 11 | $filename = $unique_filename_callback( $dir, $name ); |
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| 12 | } else { |
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| 13 | $number = ''; |
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