In-depth explanation of php var_dump() function_PHP tutorial

php var_dump The function is to determine the type and length of a variable and output the value of the variable. If the variable has a value, the value of the variable is output and the data type is returned.
Let’s take a look at the var_dump syntax:

Copy the code The code is as follows:

var_dump (var, var,bar);

Let’s take a look at an example I just gave.

Copy the code The code is as follows:

$ta =1;
$tb ='t';
echo var_dump($ta,$tb);
?>

The output is

Copy code The code is as follows:

int(1) string(1) " t"

The first number is int(1)
It's simple, but one thing to note is that the variables in var_dump must exist. If the variable exists but the value If it is empty, false will be returned;

PHP: What is the var_dump() function used for?
For example, what does var_dump($get); mean?
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This function displays structural information about one or more expressions, including the expression's type and value.

http://www.bkjia.com/PHPjc/327318.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327318.htmlTechArticlephp var_dump function is to determine the type and length of a variable and output the value of the variable. If the variable has a value, output is the value of the variable and returns the data type. Let’s take a look at the var_dump syntax: Copy...