(PHP 4, PHP 5, PHP 7)
func_get_arg — 锟斤拷锟截诧拷锟斤拷锟叫憋拷锟侥骋伙拷锟�
锟斤拷锟矫伙拷锟皆讹拷锟藉函锟斤拷锟侥诧拷锟斤拷锟叫憋拷锟叫伙拷取某锟斤拷指锟斤拷锟侥诧拷锟斤拷锟斤拷
锟矫猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟� func_get_args() 锟斤拷 func_num_args() 一锟斤拷使锟矫ｏ拷锟接讹拷使锟斤拷锟矫伙拷锟皆讹拷锟藉函锟斤拷锟斤拷锟皆斤拷锟斤拷锟皆讹拷锟斤拷锟斤拷锟斤拷牟锟斤拷锟斤拷斜锟�
arg_num锟斤拷锟斤拷锟斤拷偏锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥诧拷锟斤拷锟角达拷0锟斤拷始锟斤拷锟斤拷锟侥★拷
锟斤拷锟斤拷指锟斤拷锟侥诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟津返伙拷 FALSE 锟斤拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 5.3.0 | 锟矫猴拷锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷锟叫憋拷锟斤拷使锟矫★拷 |
| 5.3.0 |
If this function is called from the outermost scope of a file
which has been included by calling include
or require from within a function in the
calling file, it now generates a warning and returns FALSE.
锟斤拷锟斤拷知锟斤拷锟斤拷畏锟斤拷锟斤拷锟矫ｏ拷直锟接参匡拷锟斤拷2锟斤拷锟斤拷锟斤拷锟阶ｏ拷
|
锟斤拷锟斤拷锟皆讹拷锟藉函锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷玫母煤锟斤拷锟斤拷锟绞憋拷锟结发锟斤拷一锟斤拷锟斤拷锟芥，
锟斤拷锟斤拷锟角碉拷 arg_num 锟斤拷实锟绞达拷锟斤拷牟锟斤拷锟斤拷锟斤拷锟侥匡拷锟斤拷时锟斤拷也锟结发锟斤拷一锟斤拷锟斤拷锟芥。
Example #1 func_get_arg() 锟斤拷锟斤拷
<?php
function foo()
{
$numargs = func_num_args();
echo "Number of arguments: $numargs<br />\n";
if ($numargs >= 2) {
echo "Second argument is: " . func_get_arg(1) . "<br />\n";
}
}
foo (1, 2, 3);
?>
Example #2 func_get_arg() PHP 5.3 前锟斤拷员鹊锟斤拷锟斤拷锟�
test.php
<?php
function foo() {
include './fga.inc';
}
foo('First arg', 'Second arg');
?>
fga.inc
<?php
$arg = func_get_arg(1);
var_export($arg);
?>
PHP 5.3 锟芥本之前锟斤拷锟斤拷锟斤拷锟�
'Second arg'
PHP 5.3 锟斤拷之锟斤拷陌姹撅拷锟斤拷锟斤拷:
Warning: func_get_arg(): Called from the global scope - no function context in /home/torben/Desktop/code/ml/fga.inc on line 3 false
Example #3 func_get_arg() example of byref and byval arguments
<?php
function byVal($arg) {
echo 'As passed : ', var_export(func_get_arg(0)), PHP_EOL;
$arg = 'baz';
echo 'After change : ', var_export(func_get_arg(0)), PHP_EOL;
}
function byRef(&$arg) {
echo 'As passed : ', var_export(func_get_arg(0)), PHP_EOL;
$arg = 'baz';
echo 'After change : ', var_export(func_get_arg(0)), PHP_EOL;
}
$arg = 'bar';
byVal($arg);
byRef($arg);
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
Note:
锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟节碉拷前锟斤拷锟斤拷锟斤拷锟斤拷确锟斤拷锟斤拷锟斤拷锟斤拷细锟节ｏ拷锟斤拷锟斤拷锟斤拷 5.3.0 锟斤拷前锟侥版本锟叫诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥诧拷锟斤拷锟斤拷锟斤拷锟斤拷氪拷荽锟街凳憋拷锟斤拷山锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟矫此憋拷锟斤拷锟斤拷锟叫达拷锟捷★拷
Note:
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Note: This function returns a copy of the passed arguments only, and does not account for default (non-passed) arguments.