convert to lowercase & change spaces to hyphen

How do I convert the below to lowercase and change all spaces to a hyphen?

$row_rs_wp_posts['post_title']
petewinterAsked:
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dsmileConnect With a Mentor Commented:

$row_rs_wp_posts['post_title'] = str_replace(' ', '-', strtolower($row_rs_wp_posts['post_title']));

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dsmileConnect With a Mentor Commented:
strtolower() changes string to lower case.
str_replace() replaces first param by second param
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petewinterAuthor Commented:
Thanks. Sorry I also need it to remove any special characters like & ,etc. How can I do this?
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dsmileConnect With a Mentor Commented:
Simple approach: add characters you want to replace in $arySearch, and '-' to $aryReplace (number of elements must be equal)


$row_rs_wp_posts['post_title'] = strtolower($row_rs_wp_posts['post_title']); //convert string to lower
$arySearch = array(' ', '&');
$aryReplace = array('-', '-');
$row_rs_wp_posts['post_title'] = str_replace($arySearch, $aryReplace, $row_rs_wp_posts['post_title']); //replace characters

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Advanced way: read about preg_replace and use it for replacing work
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FrankoHConnect With a Mentor Commented:
here is a small function i use to clean up urls, it should do the trick, just remove/add characters to suit.

function UrlSafeString( $strVal ) {
	
		// Replaces illegal url characters with a safe alternative
			
		$strSearch = array( '"',"'", "?", " ", "/", "\\", "@", "=", "|", "+", "(", ")", "[", "]", "{", "}", "*",   "&", "#", "!", "." );
		$strReplace = array("" , "",  "", "-", "-",  "-", "-", "-", "-", "-",  "",  "",  "",  "",  "",  "",  "",  "and",  "",  "",  "" );
	
		return str_replace($strSearch, $strReplace, strtolower($strVal) );
		
		}

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petewinterAuthor Commented:
Many thanks
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