PHP Rookie (2) PHP Process Control

1. Sequential control

2. Condition control

Two if else and switch

(1) if;  if else; If else if ... else

$day _11_11= false;
if($day _11_11){
    Echo"today is Singles Day .";
}Else{
    Echo"today is not Singles Day .";
}

(2) switch (variable) {

Case value1:

Statement1;

Break;//break cannot be lost, otherwise all cases will be executed.

Case value2:

Statement2;

Break

.....

Default

Statement2;

Break

$weekday= Strftime ("%A");
Switch($weekday){
     Case"Monday":
        Echo"Today is Monday";
         Break;
     Case"Tuesday":
        Echo"Today is Tuesday";
         Break;
     Case"Wednesday":
        Echo"Today is Wednesday";
         Break;
     Case"Thursday":
        Echo"Today is Thursday";
         Break;
     Case"Friday":
        Echo"Today is Friday";
         Break;
     Case"Saturday":
        Echo"Today is Saturday";
         Break;
    default:
        Echo"Go out";
         Break;
}

3. Cycle control

Four while do...while for foreach

while (condition) {

Statement

}

do{

Statement

}while (condition);//Don't forget;

while (condition) {

Statement

}

for (EXPR1;EXPR2;EXPR3) {

Statement

}

==============================

Highlight the Foreach Loop

foreach is best at working with arrays

The syntax is foreach (array as $value) {//each time the loop assigns the value of the array element to $value and then the array pointer moves back

Statement

}

or foreach (array as $key = = $value) {//$key is an index $value is the array element value under the corresponding index

Statement

}

$price= Array("Lenono"="200dollars","Dell"="100dollars","ASUS"="Dollars");
foreach($price as$key=$value){
    Echothe price of$key is$value"."<br>";
}

Note: An error occurs when using a Foreach loop for a variable of a non-array type, so you should use the Is_array () function to determine if the variable is an array.

=======================================================

Use break to jump out of a loop directly when a condition is met.

Using continue, you can skip this loop and continue executing the loop statement when a certain condition is met.

This article is from the "thick Product Thin Hair" blog, please make sure to keep this source http://joedlut.blog.51cto.com/6570198/1852969

PHP Rookie (2) PHP Process Control