insert text after specified string using php

Question

I want to add text to a file after specified string using PHP.

For example, I want to add the word 'ldaps' after #redundant LDAP { string

I used this code without result:

$lines = array();
foreach(file("/etc/freeradius/sites-enabled/default") as $line) {
    if ("redundant LDAP {" === $line) {
        array_push($lines, 'ldaps');
    }
    array_push($lines, $line);
}
file_put_contents("/etc/freeradius/sites-enabled/default", $lines);

The only thing this code does is put lines into an array and then insert to the file without adding the word.

You dont even **attempt** to add the word `ldaps` to anything in this code — RiggsFolly, Dec 15 '17 at 11:26
contain text but I want to append word 'ldaps' after line which contain 'redundant LDAP {' — M.Bwe, Dec 15 '17 at 11:33
Can you include an example text and what you want it to look like? I think there is a much easier solution. — Andreas, Dec 15 '17 at 12:06

score 1 · Accepted Answer · edited Mar 30 '19 at 10:05

$lines = array();

foreach(file("/etc/freeradius/sites-enabled/default") as $line)) {
    // first switch these lines so you write the line and then add the new line after it

    array_push($lines, $line);

    // then test if the line contains so you dont miss a line
    // because there is a newline of something at the end of it
    if (strpos($line, "redundant LDAP {") !== FALSE) {
        array_push($lines, 'ldaps');
    }
}
file_put_contents("/etc/freeradius/sites-enabled/default", $lines);

score 0 · Answer 2 · answered Dec 15 '17 at 11:37

Currently, you only should modify your file_put_contents code and it should work. file_put_contents expect and string, but you want to pass an array. Using join, you could combine the array to an string again.

In addition to that, you might also want to add trim to your compare, to avoid problems with spaces and tabs.

$lines = array();
foreach(file("/etc/freeradius/sites-enabled/default") as $line) {
    // should be before the comparison, for the correct order
    $lines[] = $line;
    if ("redundant LDAP {" === trim($line)) {
        $lines[] = 'ldaps';
    }
}
$content = join("\n", $lines);
file_put_contents("/etc/freeradius/sites-enabled/default", $content);

insert text after specified string using php

2 Answers2