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wp_find_hierarchy_loop_tortoise_hare is private and should not be used in themes or plugins directly.
wp_find_hierarchy_loop_tortoise_hare › WordPress Function
Od3.1.0
Przestarzałyn/a
› wp_find_hierarchy_loop_tortoise_hare ( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false )
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Parametry: (5) |
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Uses the "The Tortoise and the Hare" algorithm to detect loops.
For every step of the algorithm, the hare takes two steps and the tortoise one. If the hare ever laps the tortoise, there must be a loop.Źródło
function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) { $tortoise = $start; $hare = $start; $evanescent_hare = $start; $return = array(); // Set evanescent_hare to one past hare. Increment hare two steps. while ( $tortoise && ( $evanescent_hare = isset( $override[ $hare ] ) ? $override[ $hare ] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) ) && ( $hare = isset( $override[ $evanescent_hare ] ) ? $override[ $evanescent_hare ] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) ) ) { if ( $_return_loop ) { $return[ $tortoise ] = true; $return[ $evanescent_hare ] = true; $return[ $hare ] = true; } // Tortoise got lapped - must be a loop. if ( $tortoise === $evanescent_hare || $tortoise === $hare ) { return $_return_loop ? $return : $tortoise; } // Increment tortoise by one step. $tortoise = isset( $override[ $tortoise ] ) ? $override[ $tortoise ] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) ); } return false; }