PHPで配列の最大値を見つける

mixed max ( array $values )
mixed max ( mixed $value1 , mixed $value2 [, mixed $... ] )

<?php
echo max(1, 3, 5, 6, 7);  // 7
echo max(array(2, 4, 5)); // 5

// When &#39;hello&#39; is cast as integer it will be 0. Both the parameters are equally
// long, so the order they are given in determines the result
echo max(0, &#39;hello&#39;);     // 0
echo max(&#39;hello&#39;, 0);     // hello

echo max(&#39;42&#39;, 3); // &#39;42&#39;

// Here 0 > -1, so &#39;hello&#39; is the return value.
echo max(-1, &#39;hello&#39;);    // hello

// With multiple arrays of different lengths, max returns the longest
$val = max(array(2, 2, 2), array(1, 1, 1, 1)); // array(1, 1, 1, 1)

// 对多个数组，max 从左向右比较。
   // 因此在本例中：2 == 2，但 4 < 5
$val = max(array(2, 4, 8), array(2, 5, 7)); // array(2, 5, 7)

// 如果同时给出数组和非数组作为参数，则总是将数组视为
   // 最大值返回
$val = max(&#39;string&#39;, array(2, 5, 7), 42);   // array(2, 5, 7)
?>