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var_dump是什么函数，干嘛的？
What function is var_dump and what does it do? -PHP Chinese website Q&A-What is the function of var_dump and what does it do? -PHP Chinese website Q&A
Please watch and learn.
var_dump()
void var_dump ( mixed expression [, mixed expression [, ...]] )
var_dump()方法是判断一个变量的类型与长度,并输出变量的数值,如果变量有值输的是变量的值并回返数据类型.此函数显示关于一个或多个表达式的结构信息，包括表达式的类型与值。数组将递归展开值，通过缩进显示其结构。
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What function is var_dump and what does it do? -PHP Chinese website Q&A-What is the function of var_dump and what does it do? -PHP Chinese website Q&A
Please watch and learn.
var_dump()
void var_dump ( mixed expression [, mixed expression [, ...]] )
var_dump()方法是判断一个变量的类型与长度,并输出变量的数值,如果变量有值输的是变量的值并回返数据类型.
此函数显示关于一个或多个表达式的结构信息，包括表达式的类型与值。数组将递归展开值，通过缩进显示其结构。