Tips for faster PHP scripts


	Tips for faster PHP scripts
slosd
12-15-2008 2:17 PM
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tags:
php, development
slosd says:
Some basic tips how to make your php scripts execute faster.
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/9f59e52f-f0ce-4e6b-9bba-2d69bcf13b42/93932828-AF28-4A81-93C5-75EAB7B56005/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://bitfilm.net/2007/08/24/tips-for-faster-php-scripts/" href="http://bitfilm.net/2007/08/24/tips-for-faster-php-scripts/" style="font-size: 11px;">bitfilm.net</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/08/24/tips-for-faster-php-scripts/"><STRONG><EM>5. str_replace()</EM> vs. <EM>ereg_replace()</EM> and <EM>preg_replace()
</EM></STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/08/24/tips-for-faster-php-scripts/"><EM>ereg_replace()</EM>: 26.65647 seconds
<EM>preg_replace()</EM>: 25.18324 seconds
<EM>str_replace()</EM>: 10.26872 seconds</blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content9.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/" href="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/" style="font-size: 11px;">bitfilm.net</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><STRONG>6. Pre-increment is faster than post-increment</STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/">Post-increment: 2.148 seconds
Pre-increment: 1.692 seconds</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><P>++$var;</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><P>$var++;</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><STRONG>7. Regular Expressions for input validation?</STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/">Regular Expressions: 2.401 seconds
ctype_digit: 0.985 seconds</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><STRONG>8. <EM>split()</EM> or <EM>explode()</EM></STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><EM>split()</EM>: 5.453 seconds
<EM>explode()</EM>: 3.556 seconds</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><STRONG>9. Use <EM>time()</EM> rather than <EM>date('U')</EM></STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><EM>date('U')</EM>: 19.162 seconds
<EM>time()</EM>:  0.057 seconds</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><STRONG>10. Fastest type of loop</STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/09/07/more-tips-for-faster-php-scripts/"><EM>while(++$a&lt;100000000){}</EM>: 15.519 seconds
<EM>for(;++$a&lt;100000000;){}</EM>: 17.577 seconds
<EM>do{}while(++$a&lt;100000000)</EM>: 13.744 seconds</blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content6.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/" href="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/" style="font-size: 11px;">bitfilm.net</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/"><STRONG>11. is_numeric() </STRONG><EM>vs.</EM> <STRONG>ctype_digit()</STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/"><EM>is_numeric()</EM>:<EM> </EM>9.943268 seconds
<EM>ctype_digit()</EM>: 11.801991 seconds</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/"><STRONG>14. === <EM>(Identical)</EM> </STRONG><EM>vs. </EM><STRONG>== <EM>(Equal)</EM></STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/">==: 4.194739 seconds
===: 3.510191 seconds</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/"><STRONG>15. intval('100') </STRONG><EM>vs. </EM><STRONG>(int)'100'</STRONG></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://bitfilm.net/2007/11/27/even-more-tips-for-faster-php-scripts/"><EM>intval('100')</EM>: 6.441137 seconds
<EM>(int)'100'</EM>: 2.933663 seconds</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/93932828-AF28-4A81-93C5-75EAB7B56005/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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