PHP Full Stack Development (V): PHP Learning (2. Echo and print output, array)

There are two basic output statements in PHP, Echo and print

What's the difference between these two things?

echo can output one or more characters at a time:

Echo "This is a", "string,", "used", "multiple", "parameter." ";

Like this, there is no problem with the output.

The result of the output is: This is a string that uses more than one parameter

Then echo's output is not wrapped, and if you need to wrap it, you can add it later <br>

Echo "This is a", "string,", "used", "multiple", "parameter." <br> ";

You can also add a variable output to the middle of a string.

$x=5; Echo $x, "a", "parameter." <br> ";

is still more convenient.

Can also be like this, but $x must add a space behind, or will error

$x=5; Echo "This is a", "string,", "used", "$x ", "parameter." <br> ";

Array

$cars=array("Volvo", "BMW", "Toyota");

You can create an array like this, using the count () function to return the number of elements in the array

Echo Count ($cars);

You can use the following methods to facilitate an array:

$dog=array("xxx", "yyyy", 5,3.23, "Xxd"); $lang=count($dog);  for ($x= 0; $x<$lang; $x+ +)    {echo$dog[$x], "<br>";}

Good trouble, it's not as simple as python.

PHP Full Stack Development (V): PHP Learning (2. Echo and print output, array)