Difference between revisions of "PHP"
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Line 10: | Line 10: | ||
</syntaxhighlight> | </syntaxhighlight> | ||
+ | <strong>Limited number of loops:</strong> | ||
+ | <syntaxhighlight lang=php> | ||
+ | for ($i = 0; $i <= 6; $i++) { | ||
+ | echo "Loop number: $i "; | ||
+ | } | ||
+ | </syntaxhighlight> | ||
;escapeshellcmd(shellcommand) | ;escapeshellcmd(shellcommand) | ||
Line 21: | Line 27: | ||
;<nowiki>date("Y-m-d h:i:s")</nowiki> | ;<nowiki>date("Y-m-d h:i:s")</nowiki> | ||
:Current timestamp (YYYY-mm-dd HH:MM:SS) | :Current timestamp (YYYY-mm-dd HH:MM:SS) | ||
+ | |||
+ | ;strpos($string, $search) | ||
+ | :Return position of $search exists in $string if it is not in return FALSE | ||
+ | ;preg_match($pattern, $string) | ||
+ | :Return 1 if $pattern exists in $string | ||
+ | ;str_replace($old,$new,$string) | ||
+ | :Replace $old with $new in $string | ||
+ | |||
=Functions= | =Functions= | ||
Revision as of 22:27, 7 July 2020
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>';
}
Limited number of loops:
for ($i = 0; $i <= 6; $i++) {
echo "Loop number: $i ";
}
- escapeshellcmd(shellcommand)
- Return the shellcommand with everything that might confuse the shell escaped.
- exec(<cmd>,<outputarray>,<returnvar>)
- Executed <cmd> in the shell, append the command output to he array <outputarray> and set <returnvar> to the returnvalue of the command.
- Also the last line of the command output is returned
- shell_exec(<cmd>)
- Execute <cmd> (output from excapedshellcmd) in the shell, return the command output.
- date("Y-m-d h:i:s")
- Current timestamp (YYYY-mm-dd HH:MM:SS)
- strpos($string, $search)
- Return position of $search exists in $string if it is not in return FALSE
- preg_match($pattern, $string)
- Return 1 if $pattern exists in $string
- str_replace($old,$new,$string)
- Replace $old with $new in $string
Functions
Functions have global scope, you do not need to declare them before calling
<?php
function func1($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