php如何判断数组["a","b","c"]中是否含有"a"?
<?php
$arr_1=array(
"index/logo.png",
"movie/play.png",
"movie/stop.png",
"game/war_p.png",
"game/starcaft_p.png",
"music/fly.png"
);
$arr_2=array(
"stop.png",
"fly.png"
);
//怎样将$arr_2在$arr_1出现过的图片复制到"images/"目录下?
//有没有判断某数组当中是否含有某子元素的函数?
//比如"hello"是否存在于 array("good","bad","hello")中.
?>
<?php
$arr_1=array(
"index/logo.png",
"movie/play.png",
"movie/stop.png",
"game/war_p.png",
"game/starcaft_p.png",
"music/fly.png"
);
$arr_2=array(
"stop.png",
"fly.png"
);
//怎样将$arr_2在$arr_1出现过的图片复制到"images/"目录下?
//有没有判断某数组当中是否含有某子元素的函数?
//比如"hello"是否存在于 array("good","bad","hello")中.
?>
//php如何判断数组["a","b","c"]中是否含有"a"?
$array = array('a','b','c');
if(in_array('a',$array)){
echo '存在';
} else {
echo '不存在';
}
array_search()
两个都可以。
$arr_1=array(
"index/logo.png",
"movie/play.png",
"movie/stop.png",
"game/war_p.png",
"game/starcaft_p.png",
"music/fly.png"
);
$arr_2=array(
"stop.png",
"fly.png"
);
//添加下面代码
foreach($arr_1 as $key){
foreach($arr_2 as $kkey){
if(strstr($key, $kkey)){
echo '需要复制'.$key.'这个图片<br />';
}
}
}?>
#define the string url of the destination dir
define('DES_DIR',$_SERVER['DOCUMENT_ROOT'].'/image');$arr_1=array(
"index/logo.png",
"movie/play.png",
"movie/stop.png",
"game/war_p.png",
"game/starcaft_p.png",
"music/fly.png"
);
$arr_2=array(
"stop.png",
"fly.png"
);#回调函数作为array_callback_function()的参数#callback function
function index_remove(&$value){
#不知道参数记错没有 很久没用过这个函数了
$value = preg_replace('/^(.*)\/[a-zA-Z_]?\.[png|jpg|jpeg|gif]?$/si','',$value);
}#end function index_remove$arr_3 = array_walk($arr_1,index_remove);foreach($arr_2 as $find_element_in_arr2)
{
if(in_array($arr_3,$find_element_in_arr2))
pinrtf('正在复制文件$s到目标文件夹$s',$find_element_in_arr2,DES_DIR);
#确保你有足够的写入权限到DES_DIR文件夹
@copy(dirname($find_element_in_arr2).'/'.$find_element_in_arr2,DES_DIR);
}