split function is not working anymore in php 8.2

[bertrc]

split function is not working anymore in php 8.2, is there any alternative function ?
split($users,"\n")

[benanamen]

https://www.php.net/manual/en/function.explode.php

[NogDog]

explode()

Or, if you want to use a regex: preg_split()

[bertrc]

<?php
//-i means ignore case
$users = `grep -i smith /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/phonenums.txt`;

//split the output lines into an array
//note that the \n should be \r\n on Windows;
$lines = preg_split("/\n/",$users);

foreach ($lines as $line){
    //name and phone nums are separated by, char
    $namenum = preg_split(',',$lines);
    echo "Name: {$namenum[0]},Phone #: {$namenum[1]}<br/>\n";
}
?>

in the file phonenums.txt
there is
smith,699457830
albert,34678912

Fatal error: Uncaught TypeError: preg_split(): Argument #2 ($subject) must be of type string, array given in /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/executing-commands.php:11 Stack trace: #0 /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/executing-commands.php(11): preg_split(',', Array) #1 {main} thrown in /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/executing-commands.php on line 11

the path is correct is working with the linux terminal
grep -i smith /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/phonenums.txt
return smith,699457830

[NogDog]

$namenum = preg_split(',',$lines);
// should be...
$namenum = preg_split(',',$line);

...since presumably at that point you want to split the line you are looping on.

[bertrc]

Name: smith,Phone #: [phone]

Warning: Undefined array key 1 in /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/executing-commands.php on line 12
Name: ,Phone #:

<?php
//-i means ignore case
$users = `grep -i smith /var/www/html/php-books/php-and-mysql-web-development/chapter15/executing-commands-pag-353/phonenums.txt`;

//split the output lines into an array
//note that the \n should be \r\n on Windows;
$lines = preg_split("/\n/",$users);

foreach ($lines as $line){
    //name and phone nums are separated by, char
    $namenum = preg_split('/,/' ,$line);
    echo "Name: {$namenum[0]},Phone #: {$namenum[1]}<br/>\n";
}
?>

this warning is because only return smith, is there any option to hidden this warning ?

I should use one if

   if(isset($namenum[0]) and isset($namenum[1])){
        echo "Name: {$namenum[0]},Phone #: {$namenum[1]}<br/>\n";
        }

[NogDog]

If you only want to output it if you have at least two elements, you could use count() for the condtion:

if(count($namenum) > 1) {
    // output it
}