$colors=array(
array("red","rgb(255,0,0)"),
array("yellow","rgb(255,255,0)"),
array("green","rgb(0,255,0)"),
array("blue","rgb(0,0,255)")
);
echo $colors[0][0];
echo " - ";
echo $colors[0][1];
echo "<br/>";
This really makes clear to us that what we are creating is in fact an array of arrays.
The output is: red - rgb(255,0,0)
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
Add ‘2>&1′ to the end of your shell command to have STDERR returned as well as STDOUT.
$shell_return = shell_exec($shell_command." 2>&1");
$a = array(1,2,3);
$b = array(1,7,8,9,10);
$c = $a + $b; // Union of $a and $b
echo "Union of \$a and \$b: \n";
print_r($c);
Output:
Union of arrays $a and $b:
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 9 [4] => 10 )
function roman ($nr ) {
$base_digits= array (
1=> "I",
10=> "X",
100=> "C",
1000=> "M",
);
$help_digits= array (
5=> "V",
50=> "L",
500=> "D",
);
$all_digits= $base_digits+ $help_digits;
foreach ($base_digits as $key1=> $value1 )
foreach ($all_digits as $key2=> $value2 )
if ($key1< $key2 )
$segments[$key2- $key1 ]= $value1. $value2;
$segments+= $all_digits;
krsort ($segments );
foreach ($segments as $key=> $value )
while ($key<= $nr ) {
$nr-= $key;
$str.= $value;
}
return $str;
}
echo roman (888); // prints DCCCLXXXVIII
How to get the first character of a string:
$str = 'This is a test.';
$first = $str{0};
Get the third character of a string:
$third = $str{2};
Get the last character of a string:
$str = 'This is still a test.';
$last = $str{strlen($str)-1};
Modify the last character of a string:
$str = 'Look at the sea';
$str{strlen($str)-1} = 'e';
function csv_explode($str, $delim = ',', $qual = "\"")
{
$len = strlen($str);
$inside = false;
$word = '';
for ($i = 0; $i < $len; ++$i) {
if ($str[$i]==$delim && !$inside) {
$out[] = $word;
$word = '';
} else if ($inside && $str[$i]==$qual &&
($i<$len && $str[$i+1]==$qual)) {
$word .= $qual;
++$i;
} else if ($str[$i] == $qual) {
$inside = !$inside;
} else {
$word .= $str[$i];
}
}
$out[] = $word;
return $out;
}
// Test...
$csv_str = 'a,"""","""",d,e,f';
print_r( csv_explode($csv_str) );
The array_pop() function will push the last element of the array in the assigned varable (ie $file_ext) in this case.
$file_ext = array_pop(explode(”.”,$real_filename));
Here’s how to split a text file into lines using explode(). This could be very useful for restoring backed up databases, when you need to pass every line (SQL statement) to MYSQL separatly:
$theFile = file_get_contents('file.txt');
$lines = array();
$lines = explode("\n", $theFile);
$lineCount = count($lines);
for ($i = 0; $i < $lineCount; $i++){
echo $lines[$i]."<hr>";
} //for
function lastword($theString)
{
$stringParts = explode(" ", $theString);
return array_pop($stringParts);
}
$url = 'http://www.site.com/images/logo.gif';
$x = explode('/', $url);
$filename = trim($x[count($x)-1]);
echo $filename;
The code output will be “logo.gif”
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