Introduction to the difference between PHP foreach and for statement usage

Foreach

$tar = Array (

1 => ' East ',

2 => ' West ',

3 => ' Nam ',

4 => ' North ',

5 => ' SE ',

6 => ' Southwest ',

7 => ' ne ',

8 => ' Northwest ',

9 => ' North and South ',

Ten => ' Things ',

);

Code to copy the code as follows

$TM = ' West ';

foreach ($tar as $v => $vv)

{

if ($VV = = $TM)

{

echo $vv. '-$v. '

';

Break

}

Echo $VV;

}

West-2

For

Code to copy the code as follows

Echo '

';

for ($i =1; $i <=count ($tar); $i + +)

{

if ($tar [$i] = = $TM)

{

echo $tar [$i]. ' -'. $i. '

';

Break

}

}

West-2

Summary: foreach and for results are exactly the same, but in the efficiency foreach to win with for, home for need to know the length of the array and then use $i++ to operate, page foreach does not need to know the length of the array can automatically detect and enter the key, and value.