PHP algorithm example sharing, PHP algorithm example_PHP tutorial

PHP algorithm example sharing, PHP algorithm example

Only print 0

The specific number is determined by the input parameter n

If n=5, print 00000

<&#63;php
  $n = $_GET['n'];
  for ($i=0; $i < $n; $i++) {
    echo "0";
  }
&#63;>

Print a line 0101010101010101010101

The specific number is determined by the input parameter n

For example, test.php?n=3 prints 010

<&#63;php
  $n = $_GET['n'];
  for ($i=0; $i < $n; $i++) {
    if ($i % 2 ==0) {
      echo "0";
    } else{
      echo "1";
    }
  }
&#63;>

Achieve 1 00 111 0000 11111

　for if implementation

<&#63;php

for ($i = 0; $i < 10; $i++) {
  for ($j = 0; $j <= $i; $j++) {
    if ($i % 2 == 0) {
      echo '0';
    } else {
      echo '1';
    }
  }
  echo '<br/>';
}

&#63;>

　for switch implementation

<&#63;php

for ($i = 0; $i < 10; $i++) {
  for ($j = 0; $j <= $i; $j++) {
    switch ($j % 2) {
      case '0':
      echo "0";
      break;
    case '1':
      echo "1";
      break;
    }
  }
  echo '<br/>';
}

&#63;>

　while if implementation

While switch implementation

<&#63;php

$i = 0;
while ($i < 10) {
  $j = 0;
  while ($j <= $i) {
    switch ($i % 2) {
      case 0:
        echo '0';
        break;
      case 1:
        echo '1';
        break;
    }
    $j++;
  }
  echo '<br/>';
  $i++;
}

&#63;>

Realize 0 01 010 0101……

Realize 0 01 012 0123 3210 210 10 0

Be a calculator

For example, test.php?a=1&b=2&operator=jia output 3

For example, test.php?a=5&b=2&operator=jian outputs 3

For example, test.php?a=2&b=5&operator=cheng outputs 10

For example, test.php?a=6&b=3&operator=chu output 2

<&#63;php
  $a = $_GET['a'];
  $b = $_GET['b'];
  $operator = $_GET['operator'];
  function calculate($a,$b,$operator) {
    switch ($operator) {
      case 'jia':
        $result = $a + $b;
        return $result;
        break;
      case 'jian':
        $result = $a - $b;
        return $result;
      break;
      case 'cheng':
        $result = $a * $b;
        return $result;
      break;
      case 'chu':
        $result = $a / $b;
        return $result;
      break;
    }
  }
  echo calculate($a,$b,$operator);
&#63;>

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http://www.bkjia.com/PHPjc/1032056.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1032056.htmlTechArticlePHP algorithm example sharing, PHP algorithm example only prints 0. The specific number is determined by the input parameter n, such as n=5 Just print 00000 php $n = $_GET['n']; for ($i=0; $i $n; $i ) { echo "0"; } Print a line...