处的分解字符串.但忽略十进制，例如 2.9 - explode string at . but ignore decimal eg 2.9

explode string at . but ignore decimal eg 2.9

目前我在.处爆炸一个字符串，它可以随心所欲地工作。唯一的问题是，当.作为小数点出现时，也会爆炸。有没有办法从分解函数中排除decimal点？

我目前的设置：如您所见，它在两个数字之间的.

处爆炸

$String = "This is a string.It will split at the previous point and the next one.Here 7.9 is a number";
$NewString = explode('.', $String);
print_r($NewString);
output
Array ( 
[0] => This is a string 
[1] => It will split at the previous point and the next one 
[2] => Here 7 
[3] => 9 is a number 
)

您可以使用preg_split 的正则表达式来/(?<!'d)'.(?!'d)/：

<?php
    $String = "This is a string. It will split at the previous point and the next one. Here 7.9 is a number";
    $NewString = preg_split('/(?<!'d)'.(?!'d)/', $String);
    print_r($NewString);
?>

输出：

Array
(
    [0] => This is a string
    [1] =>  It will split at the previous point and the next one
    [2] =>  Here 7.9 is a number
)

演示

正则表达式是什么意思？

(?<!'d) - 一个"负后看"，这意味着它只会在点之前没有数字（'d）时才匹配
'. - 字面.字符。它需要转义，因为正则表达式中的.意味着"任何字符"
(?!'d) - 一个"负前瞻"，意味着它只会在点后没有数字（'d）时才匹配

额外：

您可以通过使用正则表达式

作为/(?<!'d)'.(?!'d)'s*/来摆脱空格，该正则表达式还将匹配点后任意数量的空格，或者您可以使用 $NewString = array_map('trim', $NewString); .

如果需要像

您的示例一样分解文本，一个简单的方法是分解"."而不是"."。

$String = "This is a string. It will split at the previous point and the next one. Here 7.9 is a number";
$NewString = explode('. ', $String);
print_r($NewString);
output
Array ( 
[0] => This is a string 
[1] => It will split at the previous point and the next one 
[2] => Here 7.9 is a number
)