PHP syntax structure

"PHP Syntax Structure Classification"

Cyclic structure, sequential structure and selection structure

One, circular statement

(1), Foreach Loop

Defined:

A foreach loop is used to iterate through all the items in a collection, the most typical set type is an array, and in a foreach loop, one or more commands are run against each item in the array

Syntax structure:

"Example, you need to loop through the values in the $string array."

$string = "Apple", "banana", "orange"

Foreach ($fruit in $string)

{

Write-host $fruit

}

"Example, to loop through the result set returned by the Get-childitem command"

Foreach ($file in Get-childitem c:\)

{

Write-host $file

}

(2), for loop

Defined:

A For loop is used to create a command that runs in a command block when a specified condition evaluates to True, and the typical use of a For loop is an array of values that are iterating through

Syntax structure:

"Example, looping through the number 1 to 10."

for ($i =1; $i-le; $i + +)

{Write-host $i}