Difference between revisions of "PHP"

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</syntaxhighlight>
 
</syntaxhighlight>
  
 +
=Arrays=
 +
 +
;arr1 = ( val1, val2, val3 )
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:Create an indexed array. The keys are the range 0..arraylength.
 +
 +
;$arr1 = array(key1=>val1, key2=>val2, key3=>val3)
 +
;$arr2[key1] = val1
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:Create an associative array (like a hash in perl)
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 +
;count(arr1)
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:Return the number of elements (length) of an array
 +
 +
;foreach($arr1 as $key => $value) { }
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:Loop over an associative array
  
 
=Install=
 
=Install=

Latest revision as of 17:15, 9 November 2019

Script language for dynamic web-pages. The syntax and concepts used are similar to Perl

Loop over an associative array (hash):

 
foreach ( $_POST as $key => $value ) {
            echo $key.' '.$value.' '.$_POST[$key].'<br>';
        }


escapeshellcmd(shellcommand)
Return the shellcommand with everything that might confuse the shell escaped.
exec(<cmd>,<outputarray>,<returnvar>)
Executed <cmd> in the shell, append the command output to he array <outputarray> and set <returnvar> to the returnvalue of the command.
Also the last line of the command output is returned
shell_exec(<cmd>)
Execute <cmd> (output from excapedshellcmd) in the shell, return the command output.

Functions

Function have global scope, you do not need to declare them before calling

<?php
function func1($arg1, $arg2)
{
    <codeblock>
    return $value;
}
?>

Arrays

arr1 = ( val1, val2, val3 )
Create an indexed array. The keys are the range 0..arraylength.
$arr1 = array(key1=>val1, key2=>val2, key3=>val3)
$arr2[key1] = val1
Create an associative array (like a hash in perl)
count(arr1)
Return the number of elements (length) of an array
foreach($arr1 as $key => $value) { }
Loop over an associative array

Install

On debian (and its derivates)

apt-get install php-fpm php-mysql
Install php7 and mysql support
Fix php security by editing /etc/php/7.0/fpm/php.ini
Uncomment line with cgi.fix_pathinfo and set it to 0