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PHP process control, php process

PHP - if statement

The

if statement is used to execute code only when the specified condition is true.

Grammar

if (条件)
{
条件成立时要执行的代码;
}

If the current time is less than 20, the following example will output "Have a good day!":

Example

<?php
$t=date("H");
if ($t<"20")
{
echo "Have a good day!";
}
?>

Run

PHP - if...else statement

To execute a block of code when the condition is true, and to execute another block of code when the condition is not true, please use the if....else statement.

Grammar

if (条件)
{
条件成立时执行的代码;
}
else
{
条件不成立时执行的代码;
}

If the current time is less than 20, the following example will output "Have a good day!", otherwise it will output "Have a good night!":

<?php
$t=date("H");
if ($t<"20")
{
echo "Have a good day!";
}
else
{
echo "Have a good night!";
}
?>

PHP - if...else if....else statement

To execute a block of code when one of several conditions is true, use the if....else if...else statement. .

Grammar

if (条件)
{
if 条件成立时执行的代码;
}
else if (条件)
{
elseif 条件成立时执行的代码;
}
else
{
条件不成立时执行的代码;
}

If the current time is less than 10, the following example will output "Have a good morning!", if the current time is not less than 10 and less than 20, it will output "Have a good day!", otherwise it will output "Have a good night!" ":

<?php
$t=date("H");
if ($t<"10")
{
echo "Have a good morning!";
}
else if ($t<"20")
{
echo "Have a good day!";
}
else
{
echo "Have a good night!";
}
?>

　

Original address: http://www.manongjc.com/php/php_if_switch.html

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php date_default_timezone_set() sets the default time zone for date/time functions

php date_default_timezone_get() gets the default time zone used by date and time functions

php checkdate() function verifies whether the date is legal (correct)

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http://www.bkjia.com/PHPjc/1131138.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1131138.htmlTechArticlePHP process control, php process PHP - if statement The if statement is used to execute code only when the specified condition is true. Syntax if (condition){code to be executed when the condition is true;} If the current time is less than...