Phpfor loop array-PHP source code

Expr1 is the initial value of the condition. Expr2 is a judgment condition, which is usually determined by using a logical operator number (logicaloperators. Expr3 is the part to be executed after statement is executed. It is used to change the condition for the next cycle to determine that expr1 is the initial value of the condition. Expr2 is the condition for judgment. It is usually determined by a logical operator number (logical operators. Expr3 is the part to be executed after statement is executed. It is used to change the condition for the next cycle to judge.

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/*
For syntax

The Code is as follows:
For (expr1; expr2; expr3 ){ Statement }

See the for instance tutorial below

*/

The Code is as follows:
$ For = array (1, 2, 3, 4, 5, 6 ); $ ForFor = array ( Array (1 ), Array (2 ), Array (3) );

// First, let's take a look at the instances that use the for loop for a group of data.

The Code is as follows:
$ ArrayLen = sizeof ($ ); For ($ I = 0; $ I <$ arrayLen; $ I ++) { Echo $ for [$ I],' '; }

/*
Result
1
2
3
4
5
6
This is what we want.

For processing two-dimensional arrays

The Code is as follows:
*/ For ($ j = 0; $ j <$ arrayLen; $ j ++) { // Echo ($ forFor ($ j )); }

// Fatal error: Function name must be a string in prompt

// We use foreach for another instance.

The Code is as follows:
Foreach ($ forFor as $ v => $ vv) { Print_r ($ vv ); }

/*
Output
(
[0] => 1
)
Array
(
[0] => 2
)
Array
(
[0] => 3
)
Exactly the data we want,

Summary
Each statement has its own purpose. We need to see how to use a function suitable for your current operation to quickly complete your work.
From the above, for is suitable for one-dimensional data and a single cycle. foreach can operate on one-dimensional data, such as two-dimensional data.

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