PHP multidimensional array and date and time functions 12 zodiac signs date JavaScript array Python number

Traverse a two-dimensional array

<code><span><span><span><?php</span><span>$arr</span>=<span>array</span>(
    <span>array</span>(<span>"Volvo"</span>,<span>22</span>,<span>18</span>),
    <span>array</span>(<span>"BMW"</span>,<span>15</span>,<span>13</span>),
    <span>array</span>(<span>"Saab"</span>,<span>5</span>,<span>2</span>),
    <span>array</span>(<span>"Land Rover"</span>,<span>17</span>,<span>15</span>)
);
<span>echo</span><span>"<table><tr><td>汽车品牌</td><td>库存</td><td>销量</td></tr>"</span>;
<span>for</span> (<span>$i</span>=<span>0</span>;<span>$i</span><count(<span>$arr</span>);<span>$i</span>++){
    <span>echo</span><span>"<tr>"</span>;
    <span>for</span>(<span>$j</span>=<span>0</span>;<span>$j</span><count(<span>$arr</span>[<span>$i</span>]);<span>$j</span>++){
        <span>echo</span><span>"<td>"</span>.<span>$arr</span>[<span>$i</span>][<span>$j</span>].<span>"</td>"</span>;
    }
    <span>echo</span><span>"</tr>"</span>;
}
<span>echo</span><span>"</table>"</span>;
<span>?></span></span></span></code>

Date and time function date()
Date and time are stored in the form of timestamps in PHP and can be converted into an easy-to-read format through the date() function
Syntax: date (format, timestamp); omitting the second parameter defaults to the current time
Format classification:

• Y represents the year with four digits, such as 2015
• m represents the month of the year
• d represents the day of the month
• l represents the day of the week

Other characters Such as -,.,/, etc. can increase the readability of the date
Output current date:

<code><span><span><span><?php</span><span>echo</span> date(<span>'Y-d-m h:i:s'</span>).<span>"<br/>"</span>;
ehco date(<span>'Y.d.m h:i:s'</span>).<span>"<br/>"</span>;
<span>echo</span> date(<span>'Y/d/m h:i:s'</span>).<span>"<br/>"</span>;
<span>?></span></span></span></code>

Format of time:

• h 12 hour format with leading 0, return current hour
• i minutes with leading 0, return current minute
• s with leading 0 Seconds, returns the current second
• a lowercase English morning and afternoon (am, pm)

<code><span><span><?php</span>
ehco <span>'现在的时间是：'</span>.date(<span>'h:i:sa'</span>);
<span>?></span></span></code>

Note: PHP's date() returns the current date and time of the server when the second parameter is defaulted, which may If the time of the client browser is different, it may be that the time zones of the server and the client are different
date_defaut_timezone_set() can set the time zone
In PHP, you can use the time() function to obtain the timestamp of the current time, or you can use the mktime() function to convert a certain date and time into a timestamp. This function returns the Unix timestamp of the date. A Unix timestamp contains the number of seconds between the Unix epoch (January 1, 1970 00:00:00 GMT) and the specified time.
Syntax: mktime(hour, minute, second, month, day, year);
PHP's strtotime() function can convert our readable string into a timestamp

').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });

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