数据库拆分字符串函数_PHP | 不使用库函数将逗号分隔的字符串拆分为数组
数据库拆分字符串函数
Given a string with comma delimited, we have to split it into an array.
给定一个以逗号分隔的字符串,我们必须将其拆分为一个数组。
Example:
例:
Input:
"Google,Bing,Yahoo!,DuckDuckGo"
Output:
arrar of strings after splitting...
Array
(
[0] => Google
[1] => Bing
[2] => Yahoo!
[3] => DuckDuckGo
)
PHP代码将逗号分隔的字符串拆分为数组,而无需使用库函数 (PHP code to split comma delimited string into an array without using library function)
<?php
//PHP code to reverse the string without
//using library function
//function definition
//it accepts a string and returns an array
//delimited by commas
function split_string($text){
//variable to store the result i.e. an array
$arr = [];
//calculate string length
$strLength = strlen($text);
$dl = ','; //delimeter
$j = 0;
$tmp = ''; //a temp variable
//logic - it will check all characters
//and split the string when comma found
for ($i = 0; $i < $strLength; $i++) {
if($dl === $text[$i]) {
$j++;
$tmp = '';
continue;
}
$tmp .= $text[$i];
$arr[$j] = $tmp;
}
//return the result
return $arr;
}
//main code i.e. function calling
$str = "New Delhi,Mumbai,Chennai,Banglore";
$result = split_string($str);
echo "string is: " .$str. "<br/>";
echo "arrar of strings after splitting..."."<br/>";
print_r($result);
$str = "Google,Bing,Yahoo!,DuckDuckGo";
$result = split_string($str);
echo "string is: " .$str. "<br/>";
echo "arrar of strings after splitting..."."<br/>";
print_r($result);
?>
Output
输出量
string is: New Delhi,Mumbai,Chennai,Banglore
arrar of strings after splitting...
Array
(
[0] => New Delhi
[1] => Mumbai
[2] => Chennai
[3] => Banglore
)
string is: Google,Bing,Yahoo!,DuckDuckGo
arrar of strings after splitting...
Array
(
[0] => Google
[1] => Bing
[2] => Yahoo!
[3] => DuckDuckGo
)
Explanation:
说明:
We use a for loop to convert our comma delimited string into an array. We identify when a (,) appears in the string and copy that into an array then follow this process until the whole length of the string is covered. The inverted string is stored into a temporary variable ($tmp) then moved to an array ($arr[]).
我们使用for循环将逗号分隔的字符串转换为数组。 我们确定字符串中何时出现( , ),然后将其复制到数组中,然后执行此过程,直到覆盖整个字符串。 倒置的字符串存储到一个临时变量( $ tmp )中,然后移到一个数组( $ arr [] )中。
翻译自: https://www.includehelp.com/php/split-comma-delimited-string-into-an-array-without-using-library-function.aspx
数据库拆分字符串函数
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