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<?php
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/**
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* Truncates a $string to the specified $length.
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* If the supplied string is equal to or shorter than the $legth the original is returend.
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* if an $appendix is defined the resulting string will have the specified $length including the $appendix.
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*
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* @param String $string the string to truncate
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* @param Number $length the maximun length
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* @param String $appendix an optional appendix.
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*
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* @return the string
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*/
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function str_trunk(&$string, $length, $appendix=''){
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if(strlen($string) >= $length ){
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return substr($string, 0, $length - strlen($appendix)).$appendix;
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} else {
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return $string;
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}
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}
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/**
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* @param string $str
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* @param string $sub
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* @return boolean
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*/
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function str_beginsWith( $str, $sub ) {
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return ( substr( $str, 0, strlen( $sub ) ) === $sub );
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}
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/**
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*
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* @param string $str
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* @param string $sub
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* @return boolean
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*/
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function str_endsWith( $str, $sub ) {
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return ( substr( $str, strlen( $str ) - strlen( $sub ) ) === $sub );
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}
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/**
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* Replaces all occurences in $array of the key defined in $replace_map with the according values in the
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* $replace_map.
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*
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* @param $array
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* @param $replace_map
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* @return unknown_type
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*/
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function array_replace_key($array, $replace_map){
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foreach($replace_map as $key=>$newkey){
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if(isset($array[$key])){
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$array[$newkey] = $array[$key];
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unset($array[$key]);
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}
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}
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return $array;
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}
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/**
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* Replaces all occurrences of space characters with
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* an underscore and transforms the given
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* string to lowercase.
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*
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* @param String $string
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* @return the transformed string
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*/
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function generalizeString($string){
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return str_replace(' ', '_', strtolower($string));
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}
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