Panggil fungsi dalam fungsi php

Diberi nama beberapa fungsi yang ditentukan pengguna yang disimpan sebagai string dalam variabel. Tugasnya adalah memanggil fungsi menggunakan nama yang disimpan dalam variabel

Contoh

<?php

// Function without argument 

function func() {

    echo

eval( $code )

eval( $code )

eval( $code )

eval( $code )

function

eval( $code )

eval( $code )

eval( $code )

    echo

eval( $code )

eval( $code )

eval( $code )

Welcome to GeeksforGeeks!

Welcome to GeeksforGeeks!

Welcome to GeeksforGeeks!

Welcome to GeeksforGeeks!

eval( $code )

<?php0

Welcome to GeeksforGeeks!

<?php4

Ada dua metode untuk melakukan ini. Satu secara langsung memanggil fungsi dengan nama variabel menggunakan braket dan parameter dan yang lainnya adalah dengan menggunakan fungsi call_user_func() tetapi dalam kedua metode nama variabel harus digunakan

Program

<?php

// Function without argument 

function func() {

    echo  2

eval( $code )

eval( $code )

eval( $code )

function

eval( $code )

eval( $code )

eval( $code )

    echo

eval( $code )

eval( $code )

eval( $code )

// Function without argument 8

Welcome to GeeksforGeeks!

Welcome to GeeksforGeeks!

Welcome to GeeksforGeeks!

eval( $code )

<?php0

Welcome to GeeksforGeeks!

// Function without argument 8

function8

Welcome to GeeksforGeeks!

<?php0func() {2

eval( $code )

echo func() {7

eval( $code )

    _0

    _1

    2

Welcome to GeeksforGeeks!

    2<?php0    7    8________41______9

<?php4

Keluaran.

hello geek 
hello fun_function

Metode Lain. Menggunakan Fungsi eval(). Fungsi eval() adalah fungsi bawaan dalam PHP yang digunakan untuk mengevaluasi string sebagai kode PHP
Catatan. Metode ini disumbangkan oleh Vineet Joshi
Sintaksis

eval( $code )

Parameter. Fungsi ini menerima kode parameter tunggal yang digunakan untuk menyimpan kode PHP sebagai string

You can do some kind of overloading functions in PHP using "function_exists".

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.

You might for example write a "mySQL table viewer" which displays a table and it "opens a table", "dumps the header", "dumps row-by-row" and then "closes the table".

Let's suppose you want a plugin for "Stocks" which prints negative stocks in red, so you want to override the "dumping row-by-row" to do that behaviour. Instead you do not want to have all the "default behaviour" repeated in the plugin.

You may then do the following:

1) Define a default plugin (ex: "default.php"

2) Write all your functions in default.php to open, dump and close, but add them a suffix:

open_table_default()
dump_header_default()
dump_row_default()
close_table_default()

3) Call your functions with a wrapper: Insetad of this:
open_table() or open_table_default() write this:

plugincall("open_table");

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.0

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.1

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.2

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.3

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.4

Let's suppose you want a script to call plugins that are php files and you want the plugins to "override" behaviours that if not overriden are used by default.5

Bisakah Anda memanggil fungsi di dalam fungsi PHP?

Bagaimana cara memanggil fungsi di dalam fungsi lain di PHP?

Bisakah Anda memanggil fungsi dalam suatu fungsi?

Bagaimana cara memiliki fungsi dalam suatu fungsi di PHP?