php数组转成json格式的方法

本文实例讲述了php数组转成json格式的方法。分享给大家供大家参考。具体实现方法如下：

function array_to_json( $array ){

    if( !is_array( $array ) ){

        return false;

    }

    $associative = count( array_diff( array_keys($array), array_keys( array_keys( $array )) ));

    if( $associative ){

        $construct = array();

        foreach( $array as $key => $value ){

            // We first copy each key/value pair into a staging array,

            // formatting each key and value properly as we go.

            // Format the key:

            if( is_numeric($key) ){

                $key = "key_$key";

            }

            $key = "'".addslashes($key)."'";

            // Format the value:

            if( is_array( $value )){

                $value = array_to_json( $value );

            } else if( !is_numeric( $value ) || is_string( $value ) ){

                $value = "'".addslashes($value)."'";

            }

            // Add to staging array:

            $construct[] = "$key: $value";

        }

        // Then we collapse the staging array into the JSON form:

        $result = "{ " . implode( ", ", $construct ) . " }";

    } else { // If the array is a vector (not associative):

        $construct = array();

        foreach( $array as $value ){

            // Format the value:

            if( is_array( $value )){

                $value = array_to_json( $value );

            } else if( !is_numeric( $value ) || is_string( $value ) ){

                $value = "'".addslashes($value)."'";

            }

            // Add to staging array:

            $construct[] = $value;

        }

        // Then we collapse the staging array into the JSON form:

        $result = "[ " . implode( ", ", $construct ) . " ]";

    }

    return $result;

}

希望本文所述对大家的php程序设计有所帮助。