如何在php数组中使用变量从文件中读取[关闭]

Question

I am trying to figure out how to use a variable in an array that has been read from a file. This is what I have thus far and it is returning the variable name instead of the value. The example intentionally does not have a space between $var.doe and saint.$var AND places the $var in front of "doe" and behind "saint" because that is the actual data we are dealing with. Thank you for your help.

read.txt

$var.doe
saint.$var

php file

<?
$var = "john";
$aArray = file('read.txt');
echo $aArray[0];
echo '<br>';
echo $aArray[1];
?>

Answer 1

You need to substitute the variables:

php > $s = '
$var.doe
saint.$var
';
php > echo $s;

$var.doe
saint.$var
php > $var = 'jone';
php > echo str_replace('$var', $var, $s);

john.doe
saint.john