PHP search for string in text file & return result after specific character

Question

i want search string in text file. find result and return after : character.

input is alex text file include this item

alex:+123
david:+1345
john:+1456

output is +123

$input = "alex";
file_get_contents("TextFilePath");

//in this step i don't know what should i do

Dharman · Accepted Answer · 2019-06-14 17:57:19Z

1

Maybe not the best solution, but you can use file and loop on the array. explode each line to see if the needle was present.

function findInAFile($filename, $needle) {
    // read file split on newline
    $lines = file($filename);
    // check each line and return first occurence
    foreach ($lines as $line) {
        $arr = explode($needle, $line, 2);
        if (isset($arr[1])) {
            return $arr[1];
        }
    }
}

echo findInAFile('file.txt', $input.':');

answered Jun 14, 2019 at 17:57

Dharman♦

33.9k27 gold badges106 silver badges157 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

jspcal · Accepted Answer · 2019-06-14 18:41:48Z

0

You can use a regular expression match to locate lines beginning with the given input:

$input = "alex";
$text = file_get_contents("TextFilePath");
if (preg_match('#^' . preg_quote($input) . ':(.*)#m', $text, $match) {
    // Found input
    var_dump($match[1]);
}

edited Jun 14, 2019 at 18:41

answered Jun 14, 2019 at 17:49

jspcal

52k7 gold badges76 silver badges79 bronze badges

5 Comments

jspcal Over a year ago

It's an output variable that receives the result from preg_match php.net/preg_match

Wilson Over a year ago

the code only work for alex. when i change input value , output doesnt show.

jspcal Over a year ago

Are you using multi-line mode m for the regex?

jspcal Over a year ago

Then add m to the regex as above

Wilson Over a year ago

Thank you very much jspcal. it work. Can you explain the preg_match code block ? im new in php programming . and i want to know how/where you learn this methods ?

Collectives™ on Stack Overflow

PHP search for string in text file & return result after specific character

2 Answers 2

Comments

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related