Answers for "implode the array to string with space in between php"

php string replace space

$journalName = preg_replace('/\s+/', '_', $journalName);

php insert hyphen into spaces in string

$test = "jjfnj 948";
$test = str_replace(" ", "", $test);  // strip all spaces from string
echo substr($test, 0, 3)."-".substr($test, 3);  // isolate first three chars, add hyphen, and concat all characters after the first three

php glue strings

<?php
$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"

$a = "Hello ";
$a .= "World!";     // now $a contains "Hello World!"
?>