


mailfunction in php is a built-in function for sending emails, but if you really want to use the mail function to send emails, you must give your systemInstall the sendmail component. Now I encountered the problem that mail cannot send emails. Let’s take a look at the solution.
The previous server was transferred here Later, I found that the website could not send emails using mail(), but I found that sendmail has been installed. If sendmail is not installed, it can be executed. The code is as follows:
yum install sendmail
By the way, the host name must be set in a domain name format, for example :jb51.net, otherwise it will take a long time to start up when you restart sendmail, otherwise you will have to wait a long time. The code is as follows:
hostname .net
Then check whether sendmail is running normally. The code is as follows:
service sendmail status
If it is not running, it can be started. Change status to start. Then, edit php.ini and create a phpinfo in the web environment, because I use lnmp.
vi /usr/local/php/etc/php.ini
and then search :;sendmail_path =, press i to edit, replace with:
sendmail_path = /usr/sbin/sendmail -t -i
The default of my system is:
sendmail_path = /usr/sbin/sendmail -t -i -f
This -f seems to disable the mail function. After removing -f The mail function returns to normal. Then, restart the PHP process, usually: service php restart. LNMP is: service php-fpm restart. Under Apache, it can be: service httpd restart
. Let me share with you a php script test code. The code is as follows:
<?php $send = mail('your Email @lisizhang.com', '邮件标题', '测试邮件内容,如果收到此邮件,表示mail函数成功启用!'); if($send){ echo 'true'; }else{ echo 'false'; } ?>
If the return result is false, it means that the email is sent. If it returns true, it means that the email is sent successfully.
The above is the detailed content of What should I do if the mail function in PHP fails to send emails?. For more information, please follow other related articles on the PHP Chinese website!

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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