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Home > Backend Development > PHP Tutorial > Example of php custom function

Example of php custom function

WBOY
Release： 2016-07-25 08:56:51
Original
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This article shares some simple examples of custom functions in PHP, which can be used as a reference for friends in need.

1, Example of php custom function

<html>
<head>
<title>定义一个函数</title>
</head>
<body>
<?php
function bighello(){
     print "<h1>HELLO!</h1>";
}
bighello();
?>
 </body>
</html>
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2, Custom function to print text on the page

<HTML>
  <HEAD>
  <TITLE>打印文本-bbs.it-home.org</TITLE>
  </HEAD>
  <BODY>
  <?php
  function textonweb ($content, $fontsize) {
     echo "<FONT SIZE=$fontsize>$content</FONT>";
  }
  textonweb ("A <BR>", 7);
  textonweb ("AA. <BR>", 3);
  textonweb ("AAA. <BR>", 3);
  textonweb ("AAAA! <BR>", 3);
  ?>
  </BODY>
</HTML>
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3. Declare a simple php custom function

<?php
  function aFunction(){
      print "音乐是生活的一种方式";
  }
  aFunction();
?>
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4, Create custom function from string

<?
$lambda =create_function('$a,$b','return(strlen($a)-strlen($b));');
$array = array('really long string here,boy', 'this', 'middling length',
               'larger');
usort($array,$lambda);
print_r($array);
?>
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Related labels：
php 自定义函数的例子
source：php.cn
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