A brief discussion of PHP syntax (4)_PHP tutorial

File: deal.php
echo "Your username: $uname";
?> The above program will ask the user to enter a user After submitting the form, user name confirmation information will be returned. It can be seen that uname in the form has become the $uname variable in the deal.php program. Keep it simple. :-)
Let’s take a look at the basic flow control of PHP:
if…else…Elseif
Syntax 1:
if (condition) {
Statement body
}
Syntax Two:
if (condition) {
Statement body one
}else{
Statement body two
}
Grammar three:
if (condition 1) {
Statement body one
}elseif (condition 2) {
Statement body two
}else{
Statement body three
}
We change the above deal.php program to:
if ($uname=="Xiao Ming") {
echo "I'm so happy to see you, Xiao Ming.";
}elseif ($uname=="Xiaohua") {
echo "Oh, it's Xiaohua.";
}else{
echo "You are $uname, right";
}
?>
except if In addition to the statement, there is a while loop, whose syntax is as follows:
while(condition){
Statement body
}
When the condition is true, the statement body is executed. The syntax of
do...while is as follows:
do {
Statement body
}while (condition)
Execute the statement body once first. If the condition is true, the statement body will be executed again in a loop.
The syntax of the for loop is the same as C, as follows:
for (initial condition; judgment condition; condition change) {statement}
And break jumps out of the executing loop, and continue is to interrupt this loop.
Okay, that’s it for this article. I believe you will be able to get started with the above basics very quickly.

http://www.bkjia.com/PHPjc/532531.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/532531.htmlTechArticleFile: deal.php ?php echo "Your username: $uname"; ? The above program will ask The user enters a username and after submitting the form, a username confirmation message is returned. It can be seen that...