PHP: trim spaces in the middle of a string

PHP: trim spaces in the middle of a string

When you let users input text in a textfield or input box it is always a good idea to use trim function to remove spaces form the beginning or the end of the string.

Today I needed a function to trim spaces from the middle of a string and replace with a single space.

/*
    this will return the string where groups of consecutive spaces
    are collapsed in a single space

    eg. $str = "This is    my test    string";
    function will output "This is my test string"
 */
function centerTrim($str){
    return preg_replace("/\s+/", " ", $str)
}

if you need to remove all spaces you can use this function:

/*
    eg. $str = "This is    my test    string";
    function will output "Thisismyteststring"
 */
function centerTrim2($str){
    return preg_replace("/\s+/", "", $str)
}

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