PHP学习

PHP学习：

1.PHP数组长度

 

$len=count($str);
echo $len;

2.判断字符串是否为日期和时间的一个正则

 

 

<?php $time = '2011-12-29 12:21' ; $reg = "/^[0-9]{4}(\-|\/)[0-9]{1,2}(\\1)[0-9]{1,2}(|\s+[0-9]{1,2}(:[0-9]{1,2}){0,2})$/" ; if (preg_match( $reg , $time )){ echo 1; } else { echo 0; } ?>

<?php $time = '2011-12-29 12:21' ; $reg = "/^[0-9]{4}(\-|\/)[0-9]{1,2}(\\1)[0-9]{1,2}(|\s+[0-9]{1,2}(:[0-9]{1,2}){0,2})$/" ; if (preg_match( $reg , $time )){ echo 1; } else { echo 0; } ?>

<?php
$time = '2011-12-29 12:21';
$reg = "/^[0-9]{4}(\-|\/)[0-9]{1,2}(\\1)[0-9]{1,2}(|\s+[0-9]{1,2}(:[0-9]{1,2}){0,2})$/";
if (preg_match($reg,$time)){   
 echo 1;
}
else{   
 echo 0;
}
?>

3.PHP里的var_dump是打印变量的相关信息

 

4.PHP中时间转字符串的函数

 

echo date ( "Y-m-d H:i:s" , strtotime ( "2010-05-06" ) ) ;

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