[英]PHP - Fatal error when calling function (undefined function error)
我有一個PHP函數調用的新手問題。 文件:
<?php
session_start();
include("../conexionbbdd.php");
include("../conexionapi.php");
$id = $_SESSION['id'];
$inclass = $_SESSION['inclass'];
if($_SESSION['estado'] == 'activo'){
if($inclass==='1'){
checkCost();
}
else{
sendMessage();
}
function checkCost(){
//DO WHATEVER
}
function sendMessage(){
//DO WHATEVER
}
}else{
header('location:../login.php');
}
?>
控制台出現錯誤(!)致命錯誤:在第14行的C:\\ wamp \\ www [removedbyme] \\ actions \\ msg_newMessage.php中調用未定義函數checkCost()
函數必須在使用前聲明。
這將起作用:
function doSomething(){
}
doSomething();
這不會:
doSomething();
function doSomething(){
}
嘗試這個:
session_start();
include("../conexionbbdd.php");
include("../conexionapi.php");
function checkCost(){
//DO WHATEVER
}
function sendMessage(){
//DO WHATEVER
}
$id = $_SESSION['id'];
$inclass = $_SESSION['inclass'];
if($_SESSION['estado'] == 'activo'){
if($inclass==='1'){
checkCost();
}
else{
sendMessage();
}
}else{
header('location:../login.php');
}
PHP代碼是從上到下讀取的,因此,當您調用checkCost時,php並不知道checkCost存在:
<?php
session_start();
include("../conexionbbdd.php");
include("../conexionapi.php");
function checkCost(){
//DO WHATEVER
}
function sendMessage(){
//DO WHATEVER
}
$id = $_SESSION['id'];
$inclass = $_SESSION['inclass'];
if($_SESSION['estado'] == 'activo'){
if($inclass==='1'){
checkCost();
}
else{
sendMessage();
}
}else{
header('location:../login.php');
}
?>
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