html - I want to write to a certain line on a txt using php -


what want:

file.txt: name: sam email: email@email.com

so have 

<?php     $myfile = "file.txt";     $txt = 'thetxt';     $file = file($myfile);     foreach ($file $row_num => $row) {         //idk should here     }     $file_o = fopen($myfile, "w");     fwrite($file_o, $txt);     fclose($file_o); ?>

basically want have 2 , submit button setting text $string , go appropriate line on txt file.

//your file name extension $filename = "file.txt";  //text want add in file $txt = "name: sam" . php_eol . "email: email@email.com" . php_eol ;  //save file $myfile = file_put_contents($filename , $txt.php_eol , file_append | lock_ex);

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