一個(gè)類(lèi)中的變量
public $id;
public $group_id;
public $parent_id;
public $type;
public $name;
public $description;
public $is_required;
public $can_delete = '1';
public $field_order;
public $option_order;
public $order_by;
public $is_default_option;
protected $default_visibility;
protected $allow_custom_visibility;
public $do_autolink;
public $type_obj = null;
public $data;
protected $member_types;
public function __construct( $id = null, $user_id = null, $get_data = true ) {
if ( ! empty( $id ) ) {
$this->populate( $id, $user_id, $get_data );
// Initialise the type obj to prevent fatals when creating new profile fields.
} else {
$this->type_obj = bp_xprofile_create_field_type( 'textbox' );
$this->type_obj->field_obj = $this;
}
}
其中一段
public function fill_data( $args ) {
if ( is_object( $args ) ) {
$args = (array) $args;
}
$int_fields = array(
'id', 'is_required', 'group_id', 'parent_id', 'is_default_option',
'field_order', 'option_order', 'can_delete'
);
foreach ( $args as $k => $v ) {
if ( 'name' === $k || 'description' === $k ) {
$v = stripslashes( $v );
}
// Cast numeric strings as integers.
if ( true === in_array( $k, $int_fields ) ) {
$v = (int) $v;
}
$this->{$k} = $v;
}
// Create the field type and store a reference back to this object.
$this->type_obj = bp_xprofile_create_field_type( $this->type );
$this->type_obj->field_obj = $this;
}
bp_xprofile_create_field_type是一個(gè)公共函數(shù),返回?cái)?shù)據(jù)是
{"name":"單選按鈕","category":"多項(xiàng)資料","accepts_null_value":false,"supports_options":true,"supports_multiple_defaults":false,"supports_richtext":false,"field_obj":null}
請(qǐng)問(wèn)函數(shù)fill_data 中$this到底是什么意思呢
$this代表剛剛生成的$this->{$k}數(shù)組嗎?
2 回答
三國(guó)紛爭(zhēng)
TA貢獻(xiàn)1804條經(jīng)驗(yàn) 獲得超7個(gè)贊
$this是一個(gè)指向調(diào)用方的引用，既然是引用，那么就跟實(shí)例有一樣的效果，比如訪(fǎng)問(wèn)屬性，方法，或者給屬性賦值等。但$this并不是出現(xiàn)在某個(gè)類(lèi)里面就代表該類(lèi)的實(shí)例，比如說(shuō)在繼承的情況下,$this可能指向的是子類(lèi)實(shí)例。
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