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What is the role of php process control statements, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

The function of php process control statement is to perform different actions based on different conditions. There are three kinds of process control statements in PHP, which are sequential statement, select statement and loop statement.

This article operating environment: windows7 system, PHP7.4 version, DELL G3 computer

The function of php process Control statement

The function of php process control statement is to perform different actions based on different conditions.

There are three kinds of PHP process control statements, which are sequential statement, select statement and loop statement. It plays an important role in programming.

As before, create a php file to write the PHP file.

The process of sequential statement execution is from top to bottom, from left to right, without jumping.

The selection statement is interesting and can only be executed if the conditions are met. There are many kinds of choice statements.

1. If (condition) {

Execute statement

}

2. If (condition) {

Execute statement

} else {

Execute statement

}

3. If (condition) {

Execute statement

} else if (condition) {

Execute statement

} else {

Execute statement

}

4.switch (condition) {

Case 1: statement; break

Case 2: statement; break

Case 3: statement; break

.

Default: statement; break

}

There are mainly three kinds of loop control statements: while, for and do while. To put it bluntly, it is repeated implementation. But you have to understand that it was carried out several times.

1. Initial value, such as $axi5

While (condition) {

Cyclic body

Step by step increment

}

2.for (initial value; condition; step increment) {

Cyclic body

}

3.

Initial value

Do {

Circular problem

Step by step increment

} while (condition)

In PHP, there is a special loop. Cyclic associative array

4.foreach (value as $key= > $val) {

Circular problem

}

Matters needing attention

Do () {} while circulates one more time than while

Break is to stop the loop, continue is to jump out of the loop, and then the loop

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