lixlpixel php code snippets | string handling


<?php

   

   // InStr function

   // checks for an occurance of a string

   // within another string

   function InStr($String,$Find,$CaseSensitive = false) {

    $i=0;

    while (strlen($String)>=$i) {

     unset($substring);

     if ($CaseSensitive) {

      $Find=strtolower($Find);

      $String=strtolower($String);

     }

     $substring=substr($String,$i,strlen($Find));

     if ($substring==$Find) return true;

     $i++;

    }

    return false;

   }

 

   // A similar function, returns the number of occurances

   function InStrCount($String,$Find,$CaseSensitive = false) {

    $i=0;

    $x=0;

    while (strlen($String)>=$i) {

     unset($substring);

     if ($CaseSensitive) {

      $Find=strtolower($Find);

      $String=strtolower($String);

     }

     $substring=substr($String,$i,strlen($Find));

     if ($substring==$Find) $x++;

     $i++;

    }

    return $x;

   }

 

   // Another similar function, this will return the position of

   // the string. returns -1 if the string does not exist

   function InStrPos($String,$Find,$CaseSensitive = false) {

    $i=0;

    while (strlen($String)>=$i) {

     unset($substring);

     if ($CaseSensitive) {

      $Find=strtolower($Find);

      $String=strtolower($String);

     }

     $substring=substr($String,$i,strlen($Find));

     if ($substring==$Find) return $i;

     $i++;

    }

    return -1;

   }

  

  ?>