例子 2. in_array() 严格类型检查例子<?php $a = array('1.10', 12.4, 1.13);if (in_array('12.4', $a, TRUE)) echo "'12.4' found with strict check\n"; if (in_array(1.13, $a, TRUE)) echo "1.13 found with strict check\n"; ?> 将显示: 1.13 found with strict check
例子 3. in_array() 中用数组作为 needle<?php $a = array(array('p', 'h'), array('p', 'r'), 'o');if (in_array(array ('p', 'h'), $a)) echo "'ph' was found\n"; if (in_array(array ('f', 'i'), $a)) echo "'fi' was found\n"; if (in_array('o', $a)) echo "'o' was found\n"; ?>// This will output:'ph' was found 'o' was found
参见 array_search()。
sorry ,拼写错误--要求PHP版本4.0(含)以上----------------- $arr=array(12,15,26,58,89); if(in_array(56,$arr)){ echo('I am here'); }
(PHP 4 )in_array -- 如果数组中存在该值则返回 TRUE
说明
bool in_array ( mixed needle, array haystack [, bool strict])
在 haystack 中搜索 needle,如果找到则返回 TRUE,否则返回 FALSE。 如果第三个参数 strict 的值为 TRUE 则 in_array() 函数还会检查 needle 的类型是否和 haystack 中的相同。 注: 如果 needle 是字符串,则比较是区分大小写的。 注: 在 PHP 版本 4.2.0 之前,needle 不允许是一个数组。 例子 1. in_array() 例子$os = array ("Mac", "NT", "Irix", "Linux");
if (in_array ("Irix", $os)) {
print "Got Irix";
}
if (in_array ("mac", $os)) {
print "Got mac";
}
第二个条件失败,因为 in_array() 是区分大小写的,所以以上程序显示为: Got Irix
例子 2. in_array() 严格类型检查例子<?php
$a = array('1.10', 12.4, 1.13);if (in_array('12.4', $a, TRUE))
echo "'12.4' found with strict check\n";
if (in_array(1.13, $a, TRUE))
echo "1.13 found with strict check\n";
?>
将显示: 1.13 found with strict check
例子 3. in_array() 中用数组作为 needle<?php
$a = array(array('p', 'h'), array('p', 'r'), 'o');if (in_array(array ('p', 'h'), $a))
echo "'ph' was found\n";
if (in_array(array ('f', 'i'), $a))
echo "'fi' was found\n";
if (in_array('o', $a))
echo "'o' was found\n";
?>// This will output:'ph' was found
'o' was found
参见 array_search()。
$arr=array(12,15,26,58,89);
if(in_array(56,$arr)){
echo('I am here');
}
$search = "26";
$temp = array(12,15,26,58,89);
if(array_search($search,$temp)){
echo ":)";
}else{
echo ":(";
}
?>