januz.nl

Repair and check all tables

jan — Tue, 15 May 2012 09:56:35 +0000

Repair and check all tables

mysqlcheck -u root -p –auto-repair –check –optimize –all-databases

disable query caching

jan — Tue, 01 May 2012 06:54:04 +0000

disable query caching

SELECT sql_no_cache count(*) AS Count FROM DataTable WHERE Field1 = 1 AND IndexField1 = ‘B’ AND Field2 = ’1′

Sort a multidimensional array by one of its fields

jan — Fri, 27 Apr 2012 07:14:19 +0000

$products = array( array( name=>"A", price=>4.5  ),
                   array( name=>"C", price=>5.5  ),
                   array( name=>"D", price=>2.5  ),
                   array( name=>"B", price=>2.5  )
);
 
function priceCmp( $a, $b ){
    if ( $a[price] == $b[price] )
        return 0;
    if ( $a[price] < $b[price] )
         return -1;
    return 1;
}
usort( $products, priceCmp );
foreach ( $products as $val )
     print "$val[name]: $val[price]
\n";
?>

Sorting within an class:

class example{
        private $data_array_sort;
        
        public function sort_array($arr,$sort){
                $this->data_array_sort = $sort;
                usort($arr,array($this,"getRecordsSort"));
        }
        
        private function getRecordsSort($a,$b){
                if ( $a[$this->data_array_sort] == $b[$this->data_array_sort] ){
                        return 0;
                }
                if ( $a[$this->data_array_sort] < $b[$this->data_array_sort] )
                        return -1;
                return 1;
        }
}
?>

Get UUID of Hard Disks

jan — Mon, 16 Apr 2012 10:58:05 +0000

Get UUID of Hard Disks

ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 Apr 16 12:49 21687be0-47cb-4141-937b-e001077ce97d -> ../../sdb2

Find out which dependencies an .so files has

jan — Thu, 22 Mar 2012 10:52:15 +0000

Find out which dependencies an .so files has

ldd libphp5.so
        libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00002adc9956c000)
        libz.so.1 => /usr/lib64/libz.so.1 (0x00002adc997a4000)
        libmysqlclient_r.so.16 => /usr/lib64/libmysqlclient_r.so.16 (0x00002adc999b8000)
        libmcrypt.so.4 => /usr/lib64/libmcrypt.so.4 (0x00002adc99dd6000)
        libltdl.so.3 => /usr/lib64/libltdl.so.3 (0x00002adc9a007000)
        libpam.so.0 => /lib64/libpam.so.0 (0x00002adc9a20e000)
        libt1.so.5 => /usr/lib64/libt1.so.5 (0x00002adc9a41a000)
        libfreetype.so.6 => /usr/lib64/libfreetype.so.6 (0x00002adc9a674000)
        libX11.so.6 => /usr/lib64/libX11.so.6 (0x00002adc9a8f8000)
        libXpm.so.4 => /usr/lib64/libXpm.so.4 (0x00002adc9ac05000)
        libpng12.so.0 => /usr/lib64/libpng12.so.0 (0x00002adc9ae16000)
        libjpeg.so.62 => /usr/lib64/libjpeg.so.62 (0x00002adc9b03a000)
        librt.so.1 => /lib64/librt.so.1 (0x00002adc9b25c000)
        libm.so.6 => /lib64/libm.so.6 (0x00002adc9b465000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00002adc9b6e8000)
        libnsl.so.1 => /lib64/libnsl.so.1 (0x00002adc9b8ed000)
        libssl.so.6 => /lib64/libssl.so.6 (0x00002adc9bb05000)
        libcrypto.so.6 => /lib64/libcrypto.so.6 (0x00002adc9bd51000)
        libxml2.so.2 => /usr/lib64/libxml2.so.2 (0x00002adc9c0a3000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00002adc9c3e0000)
        libc.so.6 => /lib64/libc.so.6 (0x00002adc9c5fb000)
        libaudit.so.0 => /lib64/libaudit.so.0 (0x00002adc9c953000)
        libXau.so.6 => /usr/lib64/libXau.so.6 (0x00002adc9cb6b000)
        libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00002adc9cd6d000)
        /lib64/ld-linux-x86-64.so.2 (0x0000003abb000000)
        libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2 (0x00002adc9cf73000)
        libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x00002adc9d1a1000)
        libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00002adc9d436000)
        libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x00002adc9d639000)
        libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0 (0x00002adc9d85e000)
        libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00002adc9da67000)
        libresolv.so.2 => /lib64/libresolv.so.2 (0x00002adc9dc69000)
        libselinux.so.1 => /lib64/libselinux.so.1 (0x00002adc9de7e000)
        libsepol.so.1 => /lib64/libsepol.so.1 (0x00002adc9e097000)

New in PHP 5.4.0

jan — Wed, 21 Mar 2012 08:50:46 +0000

Shortened array syntax

  $myArray = []; // instead of array();
?>

Check if a variable is a specific class

jan — Fri, 09 Mar 2012 15:04:11 +0000

is_a — Checks if the object is of this class or has this class as one of its parents

bool is_a ( object $object , string $class_name [, bool $allow_string = FALSE ] )

Example

class exampleClass{
        public function foo(){
                echo "FOO";
        }
}
 
$ex = new example();
if (!is_a($ex,"example")){
        echo "var ex is not a example Class";
}
?>

string to time

jan — Fri, 09 Mar 2012 12:56:50 +0000

strtotime — Parse about any English textual datetime description into a Unix timestamp

int strtotime ( string $time [, int $now = time() ] )

Examples

echo strtotime("now");
echo strtotime("10 September 2000");
echo strtotime("+1 day");
echo strtotime("+1 week");
echo strtotime("+1 week 2 days 4 hours 2 seconds");
echo strtotime("next Thursday");
echo strtotime("last Monday");
echo strtotime("tomorrow 07:00");
?>

parse XML in browser

jan — Thu, 08 Mar 2012 14:02:51 +0000

Let the browser parse XML:

header ("content-type: text/xml");

extract filename or file extension from path

jan — Wed, 07 Mar 2012 12:58:12 +0000

$path_parts = pathinfo(‘/www/htdocs/inc/lib.inc.php’);
 
echo $path_parts[‘dirname’], "\n";
echo $path_parts[‘basename’], "\n";
echo $path_parts[‘extension’], "\n";
echo $path_parts[‘filename’], "\n"; // since PHP 5.2.0
?>