php - PHP 警告:array_combine() 和 array_merge() 生成警告
问题描述
下面的代码正在生成以下几个错误,它指向
PHP Warning: array_merge(): Expected parameter 1 to be an array, null given in /home/mike/snmpCode.php on line 20
PHP Warning: array_combine(): Both parameters should have an equal number of elements in /home/mike/snmpCode.php on line 20
#!/usr/bin/php
<?PHP
$data = snmp3_real_walk (
'localhost',
'User3',
'authPriv',
'MD5',
'pwd123',
'DES',
'pwd123',
'ETRA-VRTR-MIB::vRtrIfName'
);
print_r($data);
$Array = array();
foreach($data as $key => $val) {
$newval = explode(':',trim($val, 'STRING: '));
$newkey = explode(' ',trim($key, '[ETRA-VRTR-MIB::vRtrIfName.]'));
$Array = array_merge($Array, array_combine($newkey, $newval));
}
$data = $Array;
print_r($data);
?>
似乎指向$Array = array_merge($Array, array_combine($newkey, $newval));
我似乎无法弄清楚这个问题。
下面是snmp3_real_walk()
分配函数返回值后 $data 的打印输出的数组snmp3_real_walk()
。
Array
(
[ETRA-VRTR-MIB::vRtrIfName.1.1] => STRING: "intf1"
[ETRA-VRTR-MIB::vRtrIfName.1.2] => STRING: "intf2"
[ETRA-VRTR-MIB::vRtrIfName.1.3] => STRING: "intf3"
[ETRA-VRTR-MIB::vRtrIfName.1.4] => STRING: "intf4"
[ETRA-VRTR-MIB::vRtrIfName.1.6] => STRING: "intf5"
[ETRA-VRTR-MIB::vRtrIfName.1.7] => STRING: "intf6"
[ETRA-VRTR-MIB::vRtrIfName.1.8] => STRING: "intf7"
[ETRA-VRTR-MIB::vRtrIfName.1.9] => STRING: "intf8"
[ETRA-VRTR-MIB::vRtrIfName.1.10] => STRING: "intf9"
[ETRA-VRTR-MIB::vRtrIfName.1.11] => STRING: "intf10"
[ETRA-VRTR-MIB::vRtrIfName.1.12] => STRING: "intf11"
[ETRA-VRTR-MIB::vRtrIfName.1.13] => STRING: "intf12"
[ETRA-VRTR-MIB::vRtrIfName.1.14] => STRING: "intf13"
[ETRA-VRTR-MIB::vRtrIfName.1.15] => STRING: "intf14"
[ETRA-VRTR-MIB::vRtrIfName.1.19] => STRING: "intf15"
[ETRA-VRTR-MIB::vRtrIfName.1.39] => STRING: "intf16"
[ETRA-VRTR-MIB::vRtrIfName.1.64] => STRING: "intf17"
)
我没有将 $data 分配给 snmp_walk 函数返回并创建如下所示的数组,而是没有任何问题。
$data = array(
'[ETRA-VRTR-MIB::vRtrIfName.1.1]' => 'STRING: "intf1"',
'[ETRA-VRTR-MIB::vRtrIfName.1.2]' => 'STRING: "intf2"'
);
你能帮忙吗?
解决方案
不幸的是,你的英文描述不是很好,我不能 100% 确定你想做什么。
到目前为止,我的理解是该函数snmp3_real_walk
返回给您一个包含以下数据的数组:
Array
(
[ETRA-VRTR-MIB::vRtrIfName.1.1] => STRING: "intf1"
[ETRA-VRTR-MIB::vRtrIfName.1.2] => STRING: "intf2"
[ETRA-VRTR-MIB::vRtrIfName.1.3] => STRING: "intf3"
[ETRA-VRTR-MIB::vRtrIfName.1.4] => STRING: "intf4"
[ETRA-VRTR-MIB::vRtrIfName.1.6] => STRING: "intf5"
[ETRA-VRTR-MIB::vRtrIfName.1.7] => STRING: "intf6"
[ETRA-VRTR-MIB::vRtrIfName.1.8] => STRING: "intf7"
[ETRA-VRTR-MIB::vRtrIfName.1.9] => STRING: "intf8"
[ETRA-VRTR-MIB::vRtrIfName.1.10] => STRING: "intf9"
[ETRA-VRTR-MIB::vRtrIfName.1.11] => STRING: "intf10"
[ETRA-VRTR-MIB::vRtrIfName.1.12] => STRING: "intf11"
[ETRA-VRTR-MIB::vRtrIfName.1.13] => STRING: "intf12"
[ETRA-VRTR-MIB::vRtrIfName.1.14] => STRING: "intf13"
[ETRA-VRTR-MIB::vRtrIfName.1.15] => STRING: "intf14"
[ETRA-VRTR-MIB::vRtrIfName.1.19] => STRING: "intf15"
[ETRA-VRTR-MIB::vRtrIfName.1.39] => STRING: "intf16"
[ETRA-VRTR-MIB::vRtrIfName.1.64] => STRING: "intf17"
)
但是当您运行foreach
外观时,您会收到太多类型的警告:
PHP Warning: array_merge(): Expected parameter 1 to be an array, null given in /home/mike/snmpCode.php on line 20
PHP Warning: array_combine(): Both parameters should have an equal number of elements in /home/mike/snmpCode.php on line 20
根据您共享的数据,我编写了以下代码,运行平稳,没有警告:
// I have comment out this code on my local, because I don't have
// the implementation you use on your own development environment:
//
// $data = snmp3_real_walk (
// 'localhost',
// 'User3',
// 'authPriv',
// 'MD5',
// 'pwd123',
// 'DES',
// 'pwd123',
// 'ETRA-VRTR-MIB::vRtrIfName'
// );
// By this code, I have simulated the output of the data you have provide
// in your example:
$data = [
"ETRA-VRTR-MIB::vRtrIfName.1.1" => "STRING: intf1",
"ETRA-VRTR-MIB::vRtrIfName.1.2" => "STRING: intf2",
"ETRA-VRTR-MIB::vRtrIfName.1.3" => "STRING: intf3",
"ETRA-VRTR-MIB::vRtrIfName.1.4" => "STRING: intf4",
"ETRA-VRTR-MIB::vRtrIfName.1.6" => "STRING: intf5",
"ETRA-VRTR-MIB::vRtrIfName.1.7" => "STRING: intf6",
"ETRA-VRTR-MIB::vRtrIfName.1.8" => "STRING: intf7",
"ETRA-VRTR-MIB::vRtrIfName.1.9" => "STRING: intf8",
"ETRA-VRTR-MIB::vRtrIfName.1.10" => "STRING: intf9",
"ETRA-VRTR-MIB::vRtrIfName.1.11" => "STRING: intf10",
"ETRA-VRTR-MIB::vRtrIfName.1.12" => "STRING: intf11",
"ETRA-VRTR-MIB::vRtrIfName.1.13" => "STRING: intf12",
"ETRA-VRTR-MIB::vRtrIfName.1.14" => "STRING: intf13",
"ETRA-VRTR-MIB::vRtrIfName.1.15" => "STRING: intf14",
"ETRA-VRTR-MIB::vRtrIfName.1.19" => "STRING: intf15",
"ETRA-VRTR-MIB::vRtrIfName.1.39" => "STRING: intf16",
"ETRA-VRTR-MIB::vRtrIfName.1.64" => "STRING: intf17"
];
$Array = [];
foreach($data as $key => $val) {
$newval = explode(':',trim($val, 'STRING: '));
$newkey = explode(' ',trim($key, '[ETRA-VRTR-MIB::vRtrIfName.]'));
// By the following if statement, I try to eliminate the warnings by
// checking if both values exist.
if ( $newkey && $newval ) {
$newArray = array_combine($newkey, $newval);
// Finally to further eliminate the warnings, I try to make sure that the
// $newArray has been created.
if ( $newArray ) {
$Array = array_merge($Array, $newArray);
}
}
}
$data = $Array;
print_r($data);
上面代码在我的本地环境中的输出是这样的:
所以,如果仍然有错误,那么也许你必须检查函数的实际输出是什么snmp3_real_walk
,因为它可能会返回一些意想不到的结果。
希望这段代码对您有所帮助。
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