These aren’t default functions but I thought I’d post them:
<?php
function toalphanum( $string ) {
$newstring = "";
for( $i = 0; $i < strlen( $string ); $i++ ) {
if( ( ( $string[$i] >= "A" ) && ( $string[$i] < = "z" ) ) || ( ( $string[$i] >= "0" ) && ( $string[$i] < = "9" ) ) ) {
$newstring[$i] = $string[$i];
} else {
$newstring[$i] = "_";
} // end if
} // end for
return implode( "", $newstring );
} // end toalphanum
function toalpha( $string ) {
$newstring = "";
for( $i = 0; $i < strlen( $string ); $i++ ) {
if( ( $string[$i] >= "A" ) && ( $string[$i] < = "z" ) ) {
$newstring[$i] = $string[$i];
} else {
$newstring[$i] = "_";
} // end if
} // end for
return implode( "", $newstring );
} // end toalpha
?>
Nothing brilliant but I find it useful all over the place.
