基础代码

2021-02-26 22:23:13 +08:00
parent 7884df52f0
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+<documentation title="Class Instantiation">
+    <standard>
+    <![CDATA[
+    Instantiation of an object should be done with parenthesis.
+    ]]>
+    </standard>
+    <code_comparison>
+        <code title="Valid: with parenthesis.">
+        <![CDATA[
+$a = new Foobar<em>()</em>;
+        ]]>
+        </code>
+        <code title="Invalid: without parenthesis.">
+        <![CDATA[
+$a = new Foobar;
+        ]]>
+        </code>
+    </code_comparison>
+    <standard>
+    <![CDATA[
+    Don't use spaces between the object name and the open parenthesis when instantiating new object.
+    ]]>
+    </standard>
+    <code_comparison>
+        <code title="Valid: no whitespace between the object name and the parenthesis.">
+        <![CDATA[
+$a = new Foobar();
+        ]]>
+        </code>
+        <code title="Invalid: a space between the object name and the parenthesis.">
+        <![CDATA[
+$a = new Foobar<em> </em>();
+        ]]>
+        </code>
+    </code_comparison>
+    <standard>
+    <![CDATA[
+    Assigning the return value of "new" by reference was deprecated in PHP 5.3 and removed in PHP 7.0. New by reference should no longer be used.
+    ]]>
+    </standard>
+    <code_comparison>
+        <code title="Valid: object instantiation without reference.">
+        <![CDATA[
+$a = <em>new</em> Foobar();
+        ]]>
+        </code>
+        <code title="Invalid: object instantiation by reference.">
+        <![CDATA[
+$a = <em>& new</em> Foobar();
+        ]]>
+        </code>
+    </code_comparison>
+</documentation>