php中时间日期格式化函数

function format_date( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 = $STR."年";
        $STR = strtok( "-" );
        $STRING2 .= $STR."月";
        $STR = strtok( " " );
        $STRING2 .= $STR."日";
        return $STRING2;
}

function format_date_short1( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 = $STR."年";
        $STR = strtok( "-" );
        $STRING2 .= $STR."月";
        return $STRING2;
}

function format_date_short2( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STR = strtok( "-" );
        $STRING2 .= $STR."月";
        $STR = strtok( " " );
        $STRING2 .= $STR."日";
        return $STRING2;
}

function format_date_short3( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 .= $STR."年";
        return $STRING2;
}

function format_date_number( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 = $STR;
        $STR = strtok( "-" );
        $STRING2 .= strlen( $STR ) == 1 ? "0".$STR : $STR;
        $STR = strtok( " " );
        $STRING2 .= strlen( $STR ) == 1 ? "0".$STR : $STR;
        return $STRING2;
}

function get_week( $STRING )
{
        switch ( date( "w", strtotime( $STRING ) ) )
        {
        case 0 :
                return "日";
        case 1 :
                return "一";
        case 2 :
                return "二";
        case 3 :
                return "三";
        case 4 :
                return "四";
        case 5 :
                return "五";
        case 6 :
                return "六";
        }
}

<?php
echo memory_get_usage();
$var = str_repeat("liuhui", 10000);
echo memory_get_usage();
unset($var);
echo memory_get_usage();
?>

<?php
function convert($size){
    $unit=array('b','kb','mb','gb','tb','pb');
    return @round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i];
}
echo convert(memory_get_usage(true));
?>

<?php
function array_size($arr) {
  ob_start();
  print_r($arr);
  $mem = ob_get_contents();
  ob_end_clean();
  $mem = preg_replace("/n +/", "", $mem);
  $mem = strlen($mem);
  return $mem;
}
$memEstimate = array_size($GLOBALS);
?>

function is_date_time( $DATE_TIME_STR )
{
        if ( $DATE_TIME_STR == NULL || strlen( $DATE_TIME_STR ) == 0 )
        {
                return FALSE;
        }
        $DATE_TIME_ARRY = explode( " ", $DATE_TIME_STR );
        if ( is_date( $DATE_TIME_ARRY[0] ) && is_time( $DATE_TIME_ARRY[1] ) )
        {
                return TRUE;
        }
        return FALSE;
}

function is_number( $str )
{
        if ( substr( $str, 0, 1 ) == "-" )
        {
                $str = substr( $str, 1 );
        }
        $length = strlen( $str );
        $i = 0;
        for ( ;    $i < $length;    ++$i    )
        {
                $ascii_value = ord( substr( $str, $i, 1 ) );
                if ( 48 <= $ascii_value && $ascii_value <= 57 )
                {
                        continue;
                }
                return FALSE;
        }
        if ( $str != "0" )
        {
                $str = intval( $str );
                if ( $str == 0 )
                {
                        return FALSE;
                }
        }
        return TRUE;
}

function is_decimal( $str )
{
        if ( substr( $str, 0, 1 ) == "-" )
        {
                $str = substr( $str, 1 );
        }
        $length = strlen( $str );
        $i = 0;
        for ( ;    $i < $length;    ++$i    )
        {
                $ascii_value = ord( substr( $str, $i, 1 ) );
                if ( 0 < $i && $ascii_value == 46 || 48 <= $ascii_value && $ascii_value <= 57 )
                {
                        continue;
                }
                return FALSE;
        }
        return TRUE;
}

function is_money( $str )
{
        $dot_pos = strpos( $str, "." );
        if ( !$dot_pos )
        {
                return FALSE;
        }
        $str1 = substr( $str, 0, $dot_pos );
        if ( 14 < strlen( $str1 ) )
        {
                return FALSE;
        }
        if ( !is_number( $str1 ) )
        {
                return FALSE;
        }
        $str2 = substr( $str, $dot_pos + 1, strlen( $str ) - $dot_pos );
        if ( strlen( $str2 ) != 2 )
        {
                return FALSE;
        }
        if ( !is_number( $str2 ) )
        {
                return FALSE;
        }
        return TRUE;
}

function is_money_len( $str, $int_len, $dot_len )
{
        $dot_pos = strpos( $str, "." );
        if ( !$dot_pos )
        {
                return FALSE;
        }
        $str1 = substr( $str, 0, $dot_pos );
        if ( $int_len < strlen( $str1 ) )
        {
                return FALSE;
        }
        if ( !is_number( $str1 ) )
        {
                return FALSE;
        }
        $str2 = substr( $str, $dot_pos + 1, strlen( $str ) - $dot_pos );
        if ( strlen( $str2 ) != $dot_len )
        {
                return FALSE;
        }
        if ( !is_number( $str2 ) )
        {
                return FALSE;
        }
        return TRUE;
}

function CheckUser($C_user)

{

if (!CheckLengthBetween($C_user, 4, 20)) return false; //宽度检验

if (!ereg("^[_a-zA-Z0-9]*$", $C_user)) return false; //特殊字符检验

return true;

}

function CheckPassword($C_passwd)

{

if (!CheckLengthBetween($C_passwd, 4, 20)) return false; //宽度检测

if (!ereg("^[_a-zA-Z0-9]*$", $C_passwd)) return false; //特殊字符检测

return true;

}

function CheckTelephone($C_telephone)

{

if (!ereg("^[+]?[0-9]+([xX-][0-9]+)*$", $C_telephone)) return false;

return true;

}