substr — Retourne un segment de chaîne

substr.php

<?php

// CODE FROM https://www.php.net/manual/fr/function.substr.php
// biohazard dot ge at gmail dot com
// may be by following functions will be easier to extract the needed sub parts from a string:

after ('@', 'biohazard@online.ge');
//returns 'online.ge'
//from the first occurrence of '@'

before ('@', 'biohazard@online.ge');
//returns 'biohazard'
//from the first occurrence of '@'

between ('@', '.', 'biohazard@online.ge');
//returns 'online'
//from the first occurrence of '@'

after_last ('[', 'sin[90]*cos[180]');
//returns '180]'
//from the last occurrence of '['

before_last ('[', 'sin[90]*cos[180]');
//returns 'sin[90]*cos['
//from the last occurrence of '['

between_last ('[', ']', 'sin[90]*cos[180]');
//returns '180'
//from the last occurrence of '['

// here comes the source:


function after ($this, $inthat)
{
    if (!is_bool(strpos($inthat, $this)))
    return substr($inthat, strpos($inthat,$this)+strlen($this));
};

function after_last ($this, $inthat)
{
    if (!is_bool(strrevpos($inthat, $this)))
    return substr($inthat, strrevpos($inthat, $this)+strlen($this));
};

function before ($this, $inthat)
{
    return substr($inthat, 0, strpos($inthat, $this));
};

function before_last ($this, $inthat)
{
    return substr($inthat, 0, strrevpos($inthat, $this));
};

function between ($this, $that, $inthat)
{
    return before ($that, after($this, $inthat));
};

function between_last ($this, $that, $inthat)
{
 return after_last($this, before_last($that, $inthat));
};

// use strrevpos function in case your php version does not include it
function strrevpos($instr, $needle)
{
    $rev_pos = strpos (strrev($instr), strrev($needle));
    if ($rev_pos===false) return false;
    else return strlen($instr) - $rev_pos - strlen($needle);
};