_array.tools.php

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<?php

    // costanti per la gestione dei files csv
        define( 'ARRAY_SORT_ASC'                , 'ASC' );
        define( 'ARRAY_SORT_DSC'                , 'DSC' );
        define( 'ARRAY_SEPARATOR'               , '|' );
        define( 'CHECK_BY_KEY'                  , 'CBK' );
        define( 'CHECK_BY_VALUE'                , 'CBV' );

    function string2array( &$s, $c = ARRAY_SEPARATOR ) {
        $s = explode( $c, $s );
    }

    function array2string( &$a, $c = ARRAY_SEPARATOR ) {
        $a = implode( $c, $a );
    }

    function rksort( &$array ) {
        if( is_array( $array ) ) {
            ksort( $array );
            array_walk( $array, 'rksort' );
        }
    }

    function trimArray( &$ar, $limit = 0 ) {
/*
        $i = count( $ar ) - 1;

        while( $i >= 0 && empty( $ar[ $i ] ) && $i >= $limit ) {
                array_pop( $ar );
                $i--;
        }
*/
        $ar = array_map( 'trim', $ar );
        $ar = array_filter( $ar );

        return $ar;

    }

    function removeFromArray( &$a, $e ) {

        if( ! is_array( $e ) ) { $e = array( $e ); }

        $a = array_diff( $a, $e );

    }

    function arrayLowercase( &$a ) {

        $a = array_map( 'strtolower', $a );

    }

    if( ! function_exists( 'array_key_first' ) ) {

            function array_key_first( $a ) {
                reset( $a );
                return key( $a );
            }

    }

    if( ! function_exists( 'array_column' ) ) {

        function array_column( $a, $k ) {

            $r = array();

            if( is_array( $a ) ) {
                foreach( $a as $v ) {
# NOTA questo controllo è stato commentato per compatibilità con array_filter() di PHP
#                   if( isset( $v[ $k ] ) ) {
                        $r[] = $v[ $k ];
#                   }
                }
            }

            return $r;

        }

    }

    function arraySortBy( $field, &$array, $direction = ARRAY_SORT_ASC ) {

        usort( $array,
            create_function('$a, $b', '
                $a = $a["' . $field . '"];
                $b = $b["' . $field . '"];
                if ( $a == $b ) return 0;
                return ( $a ' . ( $direction == ARRAY_SORT_DSC ? '>' : '<' ) .' $b ) ? -1 : 1;
            ')
        );

        return true;

    }

    function arrayFilterBy( $field, $match, $array ) {

        return false;

    }

    function arrayKeyValuesImplode( $array, $tk1, $tk2, $empty = false ) {

        $t = array();

        foreach( $array as $k => $v ) {
            if( ! empty( $v ) || $empty === true ) {
                $t[] = $k . $tk1 . $v;
            }
        }

        return implode( $tk2, $t );

    }

    function arrayInsertAssoc( $ref, &$data, $array ) {

        $r = array();

        foreach( $array as $k => $v ) {

            $r[ $k ] = $v;

            if( $k == $ref ) {
                foreach( $data as $y => $j ) {
                    $r[ $y ] = $j;
                }
            }

        }

    }

    function arrayInsertSeq( $ref, &$target, $add ) {

        // echo '--' . $ref . PHP_EOL;
        // print_r( $target );
        // echo array_search( $ref, $target ) . PHP_EOL;
        // print_r( $add );

        array_splice( $target, ( array_search( $ref, $target ) + 1 ), 0, $add );

        // print_r( $target );

    }

    function addStr2arrayElements( $a, $p = NULL, $s = NULL ) {

        return array_map( function( $v ) use ( $p, $s ) {
            return $p . $v . $s;
        }, $a );

    }

?>