Question

我正在尝试创建一个程序来检查数组中是否有任何可用的信息

<?php

$fnames = array("Patrick","Janjan","Nico");
$mnames = array("Dasal","Agustino","Macatangay");
$lnames = array("Paredes","Fung","Acedillo");

$names = array($fnames,$mnames,$lnames);

if(in_array("Patrick",$names)){
  echo "It exists";
}
else{
  echo "Doesn't exists";
}

?>

输出始终不存在

Answer 1

尝试单个数组，而不是多数组

<?php

$fnames = array("Patrick","Janjan","Nico");
$mnames = array("Dasal","Agustino","Macatangay");
$lnames = array("Paredes","Fung","Acedillo");
$search = 'Patrick';
if(in_array($search,$fnames) || in_array($search,$mnames) || in_array($search,$lnames)){
  echo "It exists";
}
else{
  echo "Doesn't exists";
}

?>

Live Demo

Answer 2

使用array_merge代替array：

$fnames = array("Patrick","Janjan","Nico");
$mnames = array("Dasal","Agustino","Macatangay");
$lnames = array("Paredes","Fung","Acedillo");

$names = array_merge($fnames,$mnames,$lnames);  // Notice array_merge here.

if(in_array("Patrick",$names)){
  echo "It exists";
}
else{
  echo "Doesn't exists";
}

Answer 3

您创建了一个嵌套数组，因此您必须以不同方式访问它。想象一下当你把它写成一个变量时会发生什么：

$names = array(
    array("Patrick","Janjan","Nico"),
    array("Dasal","Agustino","Macatangay"),
    array("Paredes","Fung","Acedillo")
);

如您所见，外部数组中有三个数组。要解决您的问题，您可以使用array_merge()，从三个阵列中创建一个数组：

$names = array_merge($fnames, $mnames, $lnames);

Answer 4

您也可以使用array_intersect 因为我们知道＆＃34; patrick＆＃34;将成为一个数组的子阵列，我们可以用[[＆＃34; Patrick＆＃34;]]找到它。

$fnames = array("Patrick","Janjan","Nico");
$mnames = array("Dasal","Agustino","Macatangay");
$lnames = array("Paredes","Fung","Acedillo");

$names = array($fnames,$mnames,$lnames);

if(array_intersect($names, [["Patrick"]])){
  echo "It exists";
}
else{
  echo "Doesn't exists";
}

Answer 5

  <?php
$fnames = array("Patrick","Janjan","Nico");
$mnames = array("Dasal","Agustino","Macatangay");
$lnames = array("Paredes","Fung","Acedillo");

$names = array($fnames,$mnames,$lnames);
if (in_array("Patrick",$names[0]))
 {
  echo "Match found";
   }
  else
  {
  echo "Match not found";
  }
?>

这样可以找到输出匹配...

试图在数组中查找现有数据

5 个答案: