range()函數是PHP中的內置函數,用於創建任何類型的元素數組,例如整數,給定範圍(從低到高)內的字母,即列表的第一個元素被認為是低而最後一個被認為是一樣高
用法:
array range(low, high, step)
參數:該函數接受三個參數,如下所述:
- low:它是range()函數生成的數組中的第一個值。
- high:這將是range()函數生成的數組中的最後一個值。
- step:在範圍內使用的增量時使用,默認值為1。
返回值:返回從低到高的元素數組。
例子:
Input : range(0, 6) Output : 0, 1, 2, 3, 4, 5, 6 Explanation: Here range() function print 0 to 6 because the parameter of range function is 0 as low and 6 as high. As the parameter step is not passed, values in the array are incremented by 1. Input : range(0, 100, 10) Output : 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 Explanation: Here range() function accepts parameters as 0, 100, 10 which are values of low, high, step respectively so it returns an array with elements starting from 0 to 100 incremented by 10.
以下示例程序旨在說明PHP中的range()函數:
程序1:
<?php
// creating array with elements from 0 to 6
// using range function
$arr = range(0,6);
// printing elements of array
foreach ($arr as $a) {
echo "$a ";
}
?>
輸出:
0 1 2 3 4 5 6
程序2:
<?php
// creating array with elements from 0 to 100
// with difference of 20 between consecutive
// elements using range function
$arr = range(0,100,20);
// printing elements of array
foreach ($arr as $a) {
echo "$a ";
}
?>
輸出:
0 20 40 60 80 100
程序3:
<?php
// creating array with elements from a to j
// using range function
$arr = range('a','j');
// printing elements of array
foreach ($arr as $a) {
echo "$a ";
}
?>
輸出:
a b c d e f g h i j
程序4:
<?php
// creating array with elements from p to a
// in reverse order using range function
$arr = range('p','a');
// printing elements of array
foreach ($arr as $a) {
echo "$a ";
}
?>
輸出:
p o n m l k j i h g f e d c b a
參考:
http://php.net/manual/en/function.range.php
相關用法
- d3.js d3.range()用法及代碼示例
- HTML input range用法及代碼示例
- HTML Input Range value用法及代碼示例
- HTML Input Range name用法及代碼示例
- HTML DOM Input Range用法及代碼示例
- HTML Input Range min用法及代碼示例
- HTML Input Range max用法及代碼示例
- HTML Input Range step用法及代碼示例
- HTML Input Range stepDown()用法及代碼示例
注:本文由純淨天空篩選整理自Kanchan_Ray大神的英文原創作品 PHP | range() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。