我有如下面的多维数组
$records = array(
array(
'id' => 11,
'first_name' => 'John',
'last_name' => 'Doe',
'email' => 'john@gmail.com'
),
array(
'id' => 12,
'first_name' => 'Sally',
'last_name' => 'Smith',
'email' => 'sally@gmail.com'
),
array(
'id' => 13,
'first_name' => 'Jane',
'last_name' => 'Jones',
'email' => 'jane@gmail.com'
)
);
现在，我想将输出作为数组以id的形式作为键，并将电子邮件作为其值。
Array
(
[11] => john@gmail.com
[12] => sally@gmail.com
[13] => jane@gmail.com
)
我想要它的短代码，不需要任何冗长的代码。
我用foreach
尝试过$collect_data = array();
foreach($records as $key=>$data){
$collect_data[$data['id']] = $data['email']
}
任何人都知道上面的短代码以达到我的要求。
答案 0 :(得分：3)
我认为，您可以尝试使用php in-build功能来解决您的解决方案
$emails = array_column($records, 'email', 'id');
print_r($last_names);
您也可以参考以下链接。
答案 1 :(得分：1)
这应该适合你：
id列email只有$collect_data = array_combine(array_column($records, "id"), array_column($records, "email"));
列，您可以使用array_combine()抓住该列。
Public Class Form1
Private Function vld(ByVal ParamArray ctl() As Object) As Boolean
For i As Integer = 0 To UBound(ctl)
If ctl(i).text = "" Then
ErrorProvider1.SetError(ctl(i), ctl(i).tag)
Return False
Exit For
End If
Next
Return True
End Function
Dim cn As New OleDbConnection
Dim cm As New OleDbCommand
Dim da As OleDbDataAdapter
Dim dt As New DataTable
Private Sub Form1_FormClosing(sender As Object, e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
cn.Close()
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
TxtExamtime.Format = DateTimePickerFormat.Custom
TxtExamtime.CustomFormat = "hh:MM tt"
cn.ConnectionString = "provider=microsoft.jet.oledb.4.0; Data Source=C:\psave\New folder\save.xls;Extended Properties=Excel 8.0;"
cn.Open()
FillDataGridView("select ID, Family Name, Given Name, Gender, DOB, Exam Date, Exam Time, Street Name, House Nr, PLZ, City from [edit$]")
End Sub
Private Sub FillDataGridView(ByVal Query As String)
da = New OleDbDataAdapter(Query, cn)
dt.Clear()
da.Fill(dt)
With DataGridView1
.DataSource = dt
.Columns(0).HeaderText = "ID"
.Columns(1).HeaderText = "Family Name"
.Columns(2).HeaderText = "Given Name"
.Columns(3).HeaderText = "Gender"
.Columns(4).HeaderText = "DOB"
.Columns(5).HeaderText = "Exam Date"
.Columns(6).HeaderText = "Exam Time"
.Columns(7).HeaderText = "Street Name"
.Columns(8).HeaderText = "House Nr"
.Columns(9).HeaderText = "PLZ"
.Columns(10).HeaderText = "City"
.Columns(10).AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
End With
End Sub
Private Sub BtnSearch_Click(sender As Object, e As EventArgs) Handles BtnSearch.Click
Try
FillDataGridView("select * from [edit$] where ID='" & TxtId.Text & "'")
TxtFamilyname.Text = dt.Rows(0).Item(1)
TxtGivenname.Text = dt.Rows(0).Item(2)
TxtGender.Text = dt.Rows(0).Item(3)
TxtDob.Text = dt.Rows(0).Item(4)
TxtExamdate.Text = dt.Rows(0).Item(5)
TxtExamtime.Text = dt.Rows(0).Item(6)
TxtStreet.Text = dt.Rows(0).Item(7)
TxtHouse.Text = dt.Rows(0).Item(8)
TxtPlz.Text = dt.Rows(0).Item(9)
TxtCity.Text = dt.Rows(0).Item(10)
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Critical, Text)
End Try
End Sub
Private Sub BtnSave_Click(sender As Object, e As EventArgs) Handles BtnSave.Click
If vld(TxtId, TxtFamilyname, TxtGivenname, TxtGender, TxtDob, TxtExamdate, TxtExamtime, TxtStreet, TxtHouse, TxtPlz, TxtCity) = False Then
Exit Sub
Else
End If
Try
With cm
.Connection = cn
.CommandText = "insert into [edit$]values('" & TxtId.Text & "','" & TxtFamilyname.Text & "','" & TxtGivenname.Text & "','" & TxtGender.Text & "','" & TxtDob.Text & "','" & TxtExamdate.Text & "','" & TxtExamtime.Text & "','" & TxtStreet.Text & "','" & TxtHouse.Text & "','" & TxtPlz.Text & "','" & TxtCity.Text & "' )"
.ExecuteNonQuery()
End With
FillDataGridView("select * from [edit$]")
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Critical, Text)
Return
End Try
MsgBox("succefully Saved!", MsgBoxStyle.Information, Text)
End Sub
Private Sub BtnUpdate_Click(sender As Object, e As EventArgs) Handles Btnupdate.Click
Try
With cm
.Connection = cn
.CommandText = "Update from [edit$] set [Family Name] = '" & TxtFamilyname.Text & "' where ID ='" & TxtId.Text & "' and Given Name = '" & TxtGivenname.Text & "' and Gender = '" & TxtGender.Text & "'and DOB = '" & TxtDob.Text & "'and Exam Date'" & TxtExamdate.Text & "'and Exam Time = '" & TxtExamtime.Text & "'and Street Name = '" & TxtStreet.Text & "'and House Nr = '" & TxtHouse.Text & "'and PLZ = '" & TxtPlz.Text & "'and CITY = '" & TxtCity.Text & "'"
.ExecuteNonQuery()
End With
FillDataGridView("select * from [edit$]")
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Information, Text)
Return
End Try
MsgBox("Succesfully updated!", MsgBoxStyle.Information, Text)
End Sub
Private Sub BtnClose_Click(sender As Object, e As EventArgs) Handles BtnClose.Click
Close()
End Sub
Private Sub BtnClear_Click(sender As Object, e As EventArgs) Handles BtnClear.Click
TxtId.Clear()
TxtFamilyname.Clear()
TxtGivenname.Clear()
TxtStreet.Clear()
TxtHouse.Clear()
TxtPlz.Clear()
TxtCity.Clear()
'To see all the data in DataGridView
FillDataGridView("select * from[edit$]")
End Sub
Private Sub BtnDelete_Click(sender As Object, e As EventArgs) Handles BtnDelete.Click
Try
With cm
.Connection = cn
.CommandText = "Delete from [edit$] where [Family Name] = '" & TxtFamilyname.Text & "' and ID ='" & TxtId.Text & "' and [Given Name] = '" & TxtGivenname.Text & "'and Gender = '" & TxtGender.Text & "'and DOB = '" & TxtDob.Text & "'and [Exam Date]'" & TxtExamdate.Text & "'and [Exam Time] = '" & TxtExamtime.Text & "'and [Street Name] = '" & TxtStreet.Text & "'and [House Nr] = '" & TxtHouse.Text & "'and PLZ = '" & TxtPlz.Text & "'and CITY = '" & TxtCity.Text & "'"
.ExecuteNonQuery()
End With
MsgBox("Succesfully Deleted!", MsgBoxStyle.Information, Text)
FillDataGridView("select * from [edit$]")
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Information, Text)
End Try
End Sub
End Class
答案 2 :(得分：0)
为了兼容性，在PHP 5.5中引入了array_column，请考虑array_reduce：
$output = array_reduce($records, function($memo, $item){
$memo[$item['id'] = $item['email'];
return $memo;
}, []);
我发现它比foreach更具表现力，但这是个人品味的问题。