php 如何知道 $string 是否以 ',' 结尾?

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时间:2020-08-25 14:17:58  来源:igfitidea点击:

how to know if a $string ends with ','?

php

提问by Toni Michel Caubet

Possible Duplicate:
Find last character in a string in PHP

可能的重复:
在 PHP 中查找字符串中的最后一个字符

hi there?

你好呀?

how can i know if the last char of a $string is ',' ?

我怎么知道 $string 的最后一个字符是否是 ',' ?

thanks a lot?

多谢?

回答by ircmaxell

There are a few options:

有几个选项:

if (substr($string, -1) == ',') {

Or (slightly less readable):

或者(可读性稍差):

if ($string[strlen($string) - 1] == ',') {

Or (even less readable):

或者(甚至更难读):

if (strrpos($string, ',') == strlen($string) - 1) {

Or (even worse yet):

或者(甚至更糟):

if (preg_match('/,$/', $string)) {

Or (wow this is bad):

或者(哇,这很糟糕):

if (end(explode(',', $string)) == '') {

The take away, is just use substr($string, -1)and be done with it. But there are many other alternatives out there...

带走,只是使用substr($string, -1)并完成它。但是还有很多其他的选择......

回答by Floern

$string = 'foo,bar,';
if(substr($string, -1) === ','){
    // it ends with ','
}

回答by Steve Dickinson

You can use regular expressions for this in PHP:

您可以在 PHP 中为此使用正则表达式:

if (preg_match("/,$/", $string)) {
    #DO THIS
} else {
    #DO THAT
}

This says to check for a match of a comma at the end of the $string.

这表示检查 $string 末尾的逗号匹配。

回答by GolezTrol

if (substr($str, -1) === ',') 
{
 echo 'it is';
}

回答by mario

For the micro optimizers:

对于微优化器:

$string[strlen($string)-1] == ","

回答by slier

//$str hold your string
if(substr($str, -1) ==',')
{
   return true
}

回答by Michael Berry

See the endsWith function here:

在这里查看endsWith函数:

startsWith() and endsWith() functions in PHP

PHP中的startsWith()和endsWith()函数