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range.php

2016-05-03 10:16 495 查看

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title> New Document </title>

<meta charset="UTF-8">

<meta name="Author" content="">

<meta name="Keywords" content="">

<meta name="Description" content="">

</head>

<body>

<?php

// 产生array(0, 1, 2, 3, 4, 5)

foreach (range(0, 5) as $number) {

echo $number;//012345

}

echo " ";

// array(0, 10, 20, 30, 40,)，这里设置了step 参数

foreach (range(0, 40, 10) as $number) {

echo $number;//010203040

}

echo " ";

//产生字符数组

// array('a', 'b', 'c', 'd');

foreach (range('a', 'd') as $letter) {

echo $letter;//abcd

}

echo " ";

// array('c', 'b', 'a');第1 个参数大于第2 个参数

foreach (range('c', 'a') as $letter) {

echo $letter;//cba

}

?>

</body>

</html>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title> range2.php </title>

<meta charset="UTF-8">

<meta name="Author" content="">

<meta name="Keywords" content="">

<meta name="Description" content="">

</head>

<body>

<?php

// 产生array(0, 1, 2, 3, 4, 5)

$number=range(0, 5);

var_dump($number);//012345

echo " ";

// array(0, 10, 20, 30, 40,)，这里设置了step 参数

$number=range(0, 40, 10);

var_dump($number);//010203040

echo " ";

//产生字符数组

// array('a', 'b', 'c', 'd');

$letter=range('a', 'd');

var_dump($letter);//abcd

echo " ";

// array('c', 'b', 'a');第1 个参数大于第2 个参数

$letter=range('c', 'a');

var_dump($letter);//cba

?>

</body>

</html>

array
0 =>  0
1 =>  1
2 =>  2
3 =>  3
4 =>  4
5 =>  5

array
0 =>  0
1 =>  10
2 =>  20
3 =>  30
4 =>  40

array
0 =>  'a' (length=1)
1 =>  'b' (length=1)
2 =>  'c' (length=1)
3 =>  'd' (length=1)

array
0 =>  'c' (length=1)
1 =>  'b' (length=1)
2 =>  'a' (length=1)

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