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错别字&MD代码错误 #121

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错别字
goodspb Nov 4, 2015
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代码显示错误
goodspb Nov 4, 2015
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goodspb committed Nov 4, 2015
commit ac622243c96b3f35f653af4ad3163949bb4c9c5e
2 changes: 1 addition & 1 deletion 7.1.md
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Expand Up @@ -147,7 +147,7 @@ ZEND_FUNCTION(sample_hello_world) {

````
如果你不传递第二个参数，则扩展函数会被认为默认而不去修改载体。所以，我们需要自己来预先设置有载体的值，它往往是是NULL，或者一个与函数逻辑有关的值。
每个zval，包括IS_NULL型的zval，都需要占用一定的内存空间，并且需要cpu的计算资源来为它申请内存、初始化，并在它们完成工作后释放掉。但是很多代码都都没有意识到这一点。有很多代码都会把一个null型的值包裹成zval的IS_NULL类型，在扩展开发里这种操作是可以优化的，我们可以把参数接收城C语言里的NULL。我们就这一个问题看以下代码：
每个zval，包括IS_NULL型的zval，都需要占用一定的内存空间，并且需要cpu的计算资源来为它申请内存、初始化，并在它们完成工作后释放掉。但是很多代码都都没有意识到这一点。有很多代码都会把一个null型的值包裹成zval的IS_NULL类型，在扩展开发里这种操作是可以优化的，我们可以把参数接收成C语言里的NULL。我们就这一个问题看以下代码：
````c
ZEND_FUNCTION(sample_arg_fullnull) {
zval *val;
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