__sleep():
使用serialize()序列化的时候，会检测类中是否有__sleep()魔术方法，有的话会先调用__sleep()，返回一个包含对象中所有需要序列化的变量名称的数组
<code><span><?php</span><span><span>class</span><span>test</span>{</span><span>public</span><span>$name</span>=<span>'demon'</span>; <span>private</span><span>$age</span>=<span>'19'</span>; <span>public</span><span><span>function</span><span>__sleep</span><span>()</span>{</span><span>return</span> [<span>'name'</span>]; } }<span>$test</span> = <span>new</span> test();<span>echo</span> serialize(<span>$test</span>);<span>//输出结果：O:4:"test":1:{s:4:"name";s:5:"demon";}</span></code>
__wakeup()
使用serialize()序列化的时候，会检测类中是否有__wakeup()魔术方法，有的话会先调用__wakeup()，执行一些初始化操作
<code><span><?php</span><span><span>class</span><span>test</span>{</span><span>public</span><span>$name</span>=<span>'demon'</span>; <span>private</span><span>$age</span>=<span>'19'</span>; <span>public</span><span><span>function</span><span>say</span><span>()</span>{</span><span>echo</span><span>"反序列化"</span>; } <span>public</span><span><span>function</span><span>__wakeup</span><span>()</span>{</span><span>$this</span>->say(); } }<span>$test</span> = <span>new</span> test();unserialize(serialize(<span>$test</span>));<span>//输出结果：反序列化</span></code>
__toString()
__toString()用于一个类被当做字符串使用时的回应，只能返回一个字符串
<code><span><?php</span><span><span>class</span><span>test</span>{</span><span>public</span><span>$name</span>=<span>'demon'</span>; <span>private</span><span>$age</span>=<span>'19'</span>; <span>public</span><span><span>function</span><span>__toString</span><span>()</span>{</span><span>return</span><span>'test'</span>; } }<span>$test</span> = <span>new</span> test();<span>echo</span><span>$test</span>;<span>//输出结果：test</span></code>
__debuginfo()
__debuginfo() 是php5.6增加的特性，var_dump()一个类时的回应，返回一个包含对象属性的数组
<code><span><?php</span><span><span>class</span><span>test</span>{</span><span>public</span><span>$name</span>=<span>'demon'</span>; <span>private</span><span>$age</span>=<span>'19'</span>; <span>public</span><span><span>function</span><span>__debuginfo</span><span>()</span>{</span><span>return</span> [<span>'name'</span>]; }}<span>$test</span> = <span>new</span> test();var_dump(<span>$test</span>);<span>//输出结果：object(test)#1 (1) { [0]=> strin<div>本文来*源gaodai^.ma#com搞#代!码网</div><pre>搞gaodaima代码
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‘).text(i)); }; $numbering.fadeIn(1700); }); }); </script>以上就介绍了php 魔术方法 __sleep __wakeup __toString __debuginfo，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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转载请注明原文链接：php 魔术方法 __sleep __wakeup __toString __debuginfo
转载请注明原文链接：php 魔术方法 __sleep __wakeup __toString __debuginfo
