Question

PHP整个数组中字符串出现的次数

Array
(
[0] => .
[1] => ..
[2] => 1357795020.txt
[3] => 1357795025.txt
[4] => 1357795179.txt
[5] => 1357795205.txt
[6] => 1357795213.txt
[7] => aaa
[8] => index.php
[9] => menu.php
)
.txt在数组中出现的次数

Answer 1

楼上用数组的方法已经实现了次数统计，我这里也提供另外一种正则方法。
$json_arr = json_encode($arr);
preg_match_all('/".*?\.txt"/i',$json_arr,$matches);
echo '次数:'.count($matches[0]);

Answer 2

试编写代码如下：

<meta charset="UTF-8"/>
<?php
$arr = Array
(
0 => '.',
1 => '..',
2 => '1357795020.txt',
3 => '1357795025.txt',
4 => '1357795179.txt',
5 => '1357795205.txt',
6 => '1357795213.txt',
7 => 'aaa',
8 => 'index.php',
9 => 'menu.php'
);
$sum = 0;
foreach($arr as $value)
{
if(strpos($value,'.txt')) $sum++;
}
echo '含有 .txt 的共有 ', $sum ,' 个';
?>

Answer 3

试编写代码如下：

<meta charset="UTF-8"/>
<?php
$arr = Array
(
0 => '.',
1 => '..',
2 => '1357795020.txt',
3 => '1357795025.txt',
4 => '1357795179.txt',
5 => '1357795205.txt',
6 => '1357795213.txt',
7 => 'aaa',
8 => 'index.php',
9 => 'menu.php'
);
$sum = 0;
foreach($arr as $value)
{
if(strpos($value,'.txt')) $sum++;
}
echo '含有 .txt 的共有 ', $sum ,' 个';
?>

Answer 4

你在手册查看这个函数array_count_values，希望能帮助你

Answer 5

foreach($array as $k){
if(strstr($k,'txt')) $i++;
}
echo '共出现txt次数：'. $i;