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PHP 知识管理系统（基于树结构的知识管理系统）, 英文原版的PHP源码。

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        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#fireEvent" href="output/Ext.util.Observable.html#fireEvent">Observable</a></td>
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        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
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        <a id="Ext.air.NativeObservable-hasListener"></a>
            <b>hasListener</b>(&nbsp;<code>String eventName</code>&nbsp;) : Boolean            <div class="mdesc">
                        <div class="short">Checks to see if this object has any listeners for a specified event</div>
            <div class="long">
                Checks to see if this object has any listeners for a specified event    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to check for</div></li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>Boolean</code><div class="sub-desc">True if the event is being listened for, else false</div></li>
        </ul>
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                        </div>
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        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#hasListener" href="output/Ext.util.Observable.html#hasListener">Observable</a></td>
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        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-on"></a>
            <b>on</b>(&nbsp;<code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>, <span class="optional" title="Optional">[<code>Object options</code>]</span>&nbsp;) : void            <div class="mdesc">
                        <div class="short">Appends an event handler to this element (shorthand for addListener)</div>
            <div class="long">
                Appends an event handler to this element (shorthand for addListener)    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope in which to execute the handler
function. The handler function's "this" context.</div></li><li><code>options</code> : Object<div class="sub-desc">(optional)</div></li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
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        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#on" href="output/Ext.util.Observable.html#on">Observable</a></td>
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        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-purgeListeners"></a>
            <b>purgeListeners</b>() : void            <div class="mdesc">
                        <div class="short">Removes all listeners for this object</div>
            <div class="long">
                Removes all listeners for this object    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li>None.</li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
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        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#purgeListeners" href="output/Ext.util.Observable.html#purgeListeners">Observable</a></td>
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        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-relayEvents"></a>
            <b>relayEvents</b>(&nbsp;<code>Object o</code>, <code>Array events</code>&nbsp;) : void            <div class="mdesc">
                        <div class="short">Relays selected events from this Observable to a different Observable</div>
            <div class="long">
                Relays selected events from this Observable to a different Observable    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li><code>o</code> : Object<div class="sub-desc">The Observable to relay events to</div></li><li><code>events</code> : Array<div class="sub-desc">Array of event names to relay</div></li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
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                        </div>
        </td>
        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#relayEvents" href="output/Ext.util.Observable.html#relayEvents">Observable</a></td>
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        <tr class="method-row inherited expandable">
        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-removeListener"></a>
            <b>removeListener</b>(&nbsp;<code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>&nbsp;) : void            <div class="mdesc">
                        <div class="short">Removes a listener</div>
            <div class="long">
                Removes a listener    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the handler</div></li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
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                        </div>
        </td>
        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#removeListener" href="output/Ext.util.Observable.html#removeListener">Observable</a></td>
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        <tr class="method-row inherited alt expandable">
        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-resumeEvents"></a>
            <b>resumeEvents</b>() : void            <div class="mdesc">
                        <div class="short">Resume firing events. (see <a ext:cls="Ext.util.Observable" ext:member="suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">suspendEvents</a>)</div>
            <div class="long">
                Resume firing events. (see <a ext:cls="Ext.util.Observable" ext:member="suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">suspendEvents</a>)    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li>None.</li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
    </div>
                </div>
                        </div>
        </td>
        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">Observable</a></td>
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        <tr class="method-row inherited expandable">
        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-suspendEvents"></a>
            <b>suspendEvents</b>() : void            <div class="mdesc">
                        <div class="short">Suspend the firing of all events. (see <a ext:cls="Ext.util.Observable" ext:member="resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">resumeEvents</a>)</div>
            <div class="long">
                Suspend the firing of all events. (see <a ext:cls="Ext.util.Observable" ext:member="resumeEvents" href="output/Ext.util.Observable.html#resumeEvents">resumeEvents</a>)    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li>None.</li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
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                </div>
                        </div>
        </td>
        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#suspendEvents" href="output/Ext.util.Observable.html#suspendEvents">Observable</a></td>
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        <tr class="method-row inherited alt expandable">
        <td class="micon"><a class="exi" href="#expand">&nbsp;</a></td>
        <td class="sig">
        <a id="Ext.air.NativeObservable-un"></a>
            <b>un</b>(&nbsp;<code>String eventName</code>, <code>Function handler</code>, <span class="optional" title="Optional">[<code>Object scope</code>]</span>&nbsp;) : void            <div class="mdesc">
                        <div class="short">Removes a listener (shorthand for removeListener)</div>
            <div class="long">
                Removes a listener (shorthand for removeListener)    <div class="mdetail-params">
        <strong>Parameters:</strong>
        <ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (this object) for the handler</div></li>        </ul>
        <strong>Returns:</strong>
        <ul>
            <li><code>void</code></li>
        </ul>
    </div>
                </div>
                        </div>
        </td>
        <td class="msource"><a ext:cls="Ext.util.Observable" ext:member="#un" href="output/Ext.util.Observable.html#un">Observable</a></td>
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                <a id="Ext.air.NativeObservable-events"></a>
        <h2>Public Events</h2>
        <div class="no-members">This class has no public events.</div>
        </div>