Question

我的数据库中有以下字符串，我想删除＆＃34; \ r \ n＆＃34;在字符串的末尾，我尝试了多次，但都失败了

例如，见下文

<?php

$text = 'Am a 44 year old divorced lady with two adult sons. Having been single for 15years and dedicating my life to my two boys, am ready now to find love and companionship with a loving caring honest man with humane values\r\n\r\nThough 44 I look much younger. Look forward to meeting a like minded honest man and share the rest of our  journey of life together with mutual understanding and complement each other.       \r\n\r\nWill be happy to forward a photograph after initial dialogue\r\n';

echo $essay = preg_replace("/(\\r\\n)$/", ' ', $text);
echo preg_replace("/\=\r\n$/", " ", $text);

我正在用

进行测试

http://phptester.net/

但无法获得预期的输出

$text = 'Am a 44 year old divorced lady with two adult sons. Having been single for 15years and dedicating my life to my two boys, am ready now to find love and companionship with a loving caring honest man with humane values\r\n\r\nThough 44 I look much younger. Look forward to meeting a like minded honest man and share the rest of our  journey of life together with mutual understanding and complement each other.       \r\n\r\nWill be happy to forward a photograph after initial dialogue';

Answer 1

要删除的\r\n不是CR + LF符号，而是4个字符串，因为在单引号字符串文字中，\是文字反斜杠。因此，您的字符串以\，r，\，n结尾。要将文字\与正则表达式匹配，您需要使用4个反斜杠，而不是2个。

请参阅PHP demo：

$text = 'Am a 44 year old divorced lady with two adult sons. Having been single for 15years and dedicating my life to my two boys, am ready now to find love and companionship with a loving caring honest man with humane values\r\n\r\nThough 44 I look much younger. Look forward to meeting a like minded honest man and share the rest of our  journey of life together with mutual understanding and complement each other.       \r\n\r\nWill be happy to forward a photograph after initial dialogue\r\n';
echo $essay = preg_replace("/\\\\r\\\\n$/", '', $text);

请注意，您可以检查字符串是以\r\n结尾，然后是substr。

Answer 2

首先，您需要将单个'更改为dobule引用字符串"

$text = "Am a 44 year old divorced lady with two adult sons. Having been single for 15years and dedicating my life to my two boys, am ready now to find love and companionship with a loving caring honest man with humane values\r\n\r\nThough 44 I look much younger. Look forward to meeting a like minded honest man and share the rest of our  journey of life together with mutual understanding and complement each other.       \r\n\r\nWill be happy to forward a photograph after initial dialogue\r\n";

然后使用

echo $essay  = preg_replace('/\\r+\\n/', '', $text);

php preg_replace删除最后一个新行字符？

2 个答案: