Two methods of generating random numbers in php example code output random ip_php Tips

Share the PHP generated random number of three methods, generate 1-10 between the repeat random number, PHP generation of random numbers of examples, need a friend reference.

How do I generate a repeat random number between 1-10 in PHP?

Example 1, using the shuffle function to generate random numbers.

<?php
$arr =range (1,10);
Shuffle ($arr);
foreach ($arr as $values)
{
  echo $values. " ";
}
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Example 2, using the Array_unique function to generate random numbers.

<?php
$arr =array ();
while (count ($arr) <10)
{
  $arr []=rand (1,10);
  $arr =array_unique ($arr);
}
echo Implode ("", $arr);
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Example 3, using the Array_flip function to generate random numbers, you can remove duplicate values.

<?php
$arr =array ();
$count 1=0;
$count = 0;
$return = Array ();
while ($count <) 
 {
  $return [] = Mt_rand (1);
  $return = Array_flip (Array_flip ($return));
  $count = count ($return);
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foreach ($return as $value)
 {
  echo $value. " ";
 }
echo "<br/>";
$arr =array_values ($return);//Get the value of the array 
foreach ($arr as $key)
echo $key. " ";
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I am an ASP programmer, this is the first time to write PHP program, a little experience sent to share

<?php 
$ip 2id= round (rand (600000, 2550000)/10000)//first method, direct generation of 
$ip 3id= round (rand (600000, 2550000)/10000 ); 
$ip 4id= Round (rand (600000, 2550000)/10000); 
Here is the second method that randomly extracts 
$arr _1 = Array ("218") in the following data. 218 "," 66 "," 66 "," 218 "," 218 "," 60 "," 60 "," 202 "," 204 "," 66 "," 66 "," 66 ", "222", "221", "the" "," "", "" "," "," "," "," "," "," "218", "218", "," "," "," "," "," "," "122", "211"); 
$randarr = Mt_rand (0,count ($arr _1)-1); 
$ip 1id = $arr _1[$randarr]; 
echo $ip 1id; 
echo "."; 
echo $ip 2id; 
echo "."; 
echo $ip 3id; 
echo "."; 
echo $ip 4id; 
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The result of the example output is 218.28.131.182
This program is characterized by the generation of IP first field in the specified range, set a few are common in the country, which means that the generated IP address is mostly domestic
Core code:

<?php 
$arr _1 = Array ("http://66.249.89.99", "http://66.249.89.104", "http://74.125.71.105"); 
$randarr = Mt_rand (0,count ($arr _1)-1); 
$GIP = $arr _1[$randarr]; 
echo $gip. " $randarr "; 
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