Method for an emergency opening of a door locking device of a door of a laundry washing and/or drying appliance by means of an emergency-opening tool, said appliance being provided with a cabinet containing an operative chamber in which laundry can be loaded/unloaded, said operative chamber being accessible via an access opening provided in said cabinet and closable by said door, said door locking device comprising: a. a support housing provided internally to said cabinet and comprising an opening, accessible from outside said cabinet, for the introduction of a pivotable hook member connected to the door, said door comprising a movable handle adapted for operating said hook member in such a way to move it from a closing position, in which, when introduced in said opening, it matches a border of the latter for keeping said door closed, to an opening position in which said hook member, when introduced in said opening, does not match the border of the latter, so as to allow the opening of the door; b. a retaining member mounted to move with respect to the support housing between a rest position in which it enables the hook member to be introduced into and extracted from said opening, and an operating position in which it retains the hook member, when introduced into said opening, in said closing position, so that it cannot be extracted from said opening; c. a safety member that can move along a moving direction in the support housing between a retracted position, in which it enables the retaining member to move from the operating position to the rest position, and an extended position, in which it prevents the retaining member from moving from the operating position to the rest position; and d. a control device that can be electrically actuated and is adapted to control the position of said safety member; wherein said emergency-opening tool comprises a shaft extending along a shaft axis and having a first bended end portion shaped so as to be able to cooperate with the safety member in order to move it from its extended to its retracted position and a second end portion provided with a tool handle, the method including: - inserting said emergency opening tool in said in said cabinet with the bended end portion pointing a first direction different from said moving direction of said safety member; - rotating said emergency opening tool about its axis in order for the bended end portion to push the safety member towards said retracted position. a. a support housing provided internally to said cabinet and comprising an opening, accessible from outside said cabinet, for the introduction of a pivotable hook member connected to the door, said door comprising a movable handle adapted for operating said hook member in such a way to move it from a closing position, in which, when introduced in said opening, it matches a border of the latter for keeping said door closed, to an opening position in which said hook member, when introduced in said opening, does not match the border of the latter, so as to allow the opening of the door; b. a retaining member mounted to move with respect to the support housing between a rest position in which it enables the hook member to be introduced into and extracted from said opening, and an operating position in which it retains the hook member, when introduced into said opening, in said closing position, so that it cannot be extracted from said opening; c. a safety member that can move along a moving direction in the support housing between a retracted position, in which it enables the retaining member to move from the operating position to the rest position, and an extended position, in which it prevents the retaining member from moving from the operating position to the rest position; and d. a control device that can be electrically actuated and is adapted to control the position of said safety member; - inserting said emergency opening tool in said in said cabinet with the bended end portion pointing a first direction different from said moving direction of said safety member; - rotating said emergency opening tool about its axis in order for the bended end portion to push the safety member towards said retracted position.