#8. Kevin on 02 February 2009

@ taith: Check, fixed!

#7. taith on 02 February 2009

some browsers will interpret a number as a string depending on how its set... hence a number, can be defined as a string, making the function return false all the time...

this will automatically turn it into an integer in this case

function is_numeric(integer){
 return (!isNaN(integer*1));
}

#6. Kevin on 01 March 2008

@ Martijn Wieringa: And additional compliments for solid code. The integration went seamlessly, nice job!

#5. Kevin on 01 March 2008

@ Martijn Wieringa: I will add the functions that are missing here, thanks alot man!

#4. Martijn Wieringa on 01 March 2008

I've been working on a simular project.. Here are some functions i completes so far.

// Load PHP library
var PHP = new PHP_LIBRARY();
 
// Call some function within PHP library
PHP.func(params);

var PHP_LIBRARY = function() {}
 
PHP_LIBRARY.prototype = 
{
  'abs' : function(f_float)
  {
    return isNaN(f_float) ? 0 : Math.abs(f_float);
  },
 
  'chr' : function(f_ascii)
  {
    return String.fromCharCode(f_ascii);
  },
 
  'explode' : function(f_seperator, f_string)
  {
    return f_string.split(f_seperator);
  },
 
  'implode' : function(f_glue, f_array)
  {
    return f_array.join(f_glue);
  },
 
  'join' : function(f_glue, f_array)
  {
    return this.implode(f_glue, f_array);
  },
 
  'number_format' : function(f_float, f_decimals, f_decimal_sign, f_thousand_sign)
  {
    if(f_decimals == undefined)
    {
      f_decimals = 0;
    }
 
    if(f_decimal_sign == undefined)
    {
      f_decimal_sign = '';
    }
 
    if(f_thousand_sign == undefined)
    {
      f_thousand_sign = '';
    }
 
    var result = this.implode(f_thousand_sign, this.str_split(Math.floor(f_float).toString(), 3, true));
 
    if(f_decimals > 0)
    {
      var d = Math.round((f_float % 1) * Math.pow(10, f_decimals)).toString();
      result += f_decimal_sign + d + this.str_repeat('0', f_decimals - d.length);
    }
 
    return result;
  },
 
  'ord' : function(f_string)
  {
    return f_string.charCodeAt(0);
  },
 
  'split' : function(f_seperator, f_string)
  {
    return this.explode(f_seperator, f_string);
  },
 
  'str_repeat' : function(f_string, f_repeat)
  {
    var result = '';
 
    while(f_repeat > 0)
    {
      result += f_string;
      f_repeat--;
    }
 
    return result;
  },
 
  'str_replace' : function(f_needle, f_replace, f_haystack)
  {
    var result = '';
    var index = 0;
 
    while((index = f_haystack.indexOf(f_needle)) > -1)
    {
      result += f_haystack.substring(0, index);
      result += f_replace;
      f_haystack = f_haystack.substring(index + f_needle.length);
    }
 
    return result + f_haystack;
  },
 
  'str_ireplace' : function(f_needle, f_replace, f_haystack)
  {
    var result = '';
    var index = 0;
 
    var haystack = f_haystack.toLowerCase();
    var needle = f_needle.toLowerCase();
 
    while((index = haystack.indexOf(needle)) > -1)
    {
      result += f_haystack.substring(0, index);
      result += f_replace;
 
      haystack = haystack.substring(index + f_needle.length);
      f_haystack = f_haystack.substring(index + f_needle.length);
    }
 
    return result + f_haystack;
  },
 
  'str_split' : function(f_string, f_split_length, f_backwards)
  {
    if(f_backwards == undefined)
    {
      f_backwards = false;
    }
 
    if(f_split_length > 0)
    {
      var result = new Array();
 
      if(f_backwards)
      {
        var r = (f_string.length % f_split_length);
 
        if(r > 0)
        {
          result[result.length] = f_string.substring(0, r);
          f_string = f_string.substring(r);
        }
      }
 
      while(f_string.length > f_split_length)
      {
        result[result.length] = f_string.substring(0, f_split_length);
        f_string = f_string.substring(f_split_length);
      }
 
      result[result.length] = f_string;
 
      return result;
    }
 
    return false;
  },
 
  'strcasecmp' : function(f_string1, f_string2)
  {
    var string1 = f_string1.toLowerCase();
    var string2 = f_string2.toLowerCase();
 
    if(string1 > string2)
    {
      return 1;
    }
    else if(string1 == string2)
    {
      return 0;
    }
 
    return -1;
  },
 
  'strcmp' : function(f_string1, f_string2)
  {
    if(f_string1 > f_string2)
    {
      return 1;
    }
    else if(f_string1 == f_string2)
    {
      return 0;
    }
 
    return -1;
  },
 
  'stripos' : function(f_haystack, f_needle, f_offset)
  {
    var haystack = f_haystack.toLowerCase();
    var needle = f_needle.toLowerCase();
    var index = 0;
 
    if(f_offset == undefined)
    {
      f_offset = 0;
    }
 
    if((index = haystack.indexOf(needle, f_offset)) > -1)
    {
      return index;
    }
 
    return false;
  },
 
  'strlen' : function(f_string)
  {
    return f_string.length;
  },
 
  'strnatcasecmp' : function(f_string1, f_string2, f_version)
  {
    this.strnatcmp(f_string1.toLowerCase(), f_string2.toLowerCase(), f_version);
  },
 
  'strnatcmp' : function(f_string1, f_string2)
  {
    if(f_version == undefined)
    {
      f_version = false;
    }
 
    var array1 = this.__strnatcmp_split(f_string1);
    var array2 = this.__strnatcmp_split(f_string2);
 
    var len = array1.length;
    var text = true;
 
    var result = -1;
    var r = 0;
 
    if(len > array2.length)
    {
      len = array2.length;
      result = 1;
    }
 
    for(i = 0; i < len; i++)
    {
      if(isNaN(array1[i]))
      {
        if(isNaN(array2[i]))
        {
          text = true;
 
          if((r = this.strcmp(array1[i], array2[i])) != 0)
          {
            return r;
          }
        }
        else if(text)
        {
          return 1;
        }
        else
        {
          return -1;
        }
      }
      else if(isNaN(array2[i]))
      {
        if(text)
        {
          return -1;
        }
        else
        {
          return 1;
        }
      }
      else 
      {
        if(text || f_version)
        {
          if((r = (array1[i] - array2[i])) != 0)
          {
            return r;
          }
        }
        else
        {
          if((r = this.strcmp(array1[i].toString(), array2[i].toString())) != 0)
          {
            return r;
          }
        }
 
        text = false;
      }
    }
 
    return result;
  },
 
  '__strnatcmp_split' : function(f_string)
  {
    var result = new Array();
    var buffer = '';
    var chr = '';
 
    var text = true;
 
    for(var i = 0; i < f_string.length; i++)
    {
      chr = f_string.substring(i, i + 1);
 
      if(chr.match(/[0-9]/))
      {
        if(text)
        {
          if(buffer.length > 0)
          {
            result[result.length] = buffer;
            buffer = '';
          }
 
          text = false;
        }
 
        buffer += chr;
      }
      else if((text == false) && (chr == '.') && (i < (f_string.length - 1)) && (f_string.substring(i + 1, i + 2).match(/[0-9]/)))
      {
        result[result.length] = buffer;
        buffer = '';
      }
      else
      {
        if(text == false)
        {
          if(buffer.length > 0)
          {
            result[result.length] = parseInt(buffer);
            buffer = '';
          }
 
          text = true;
        }
 
        buffer += chr;
      }
    }
 
    if(buffer.length > 0)
    {
      if(text)
      {
        result[result.length] = buffer;
      }
      else
      {
        result[result.length] = parseInt(buffer);
      }
    }
 
    return result;
  },
 
 
  'strpos' : function(f_haystack, f_needle, f_offset)
  {
    var index = 0;
 
    if(f_offset == undefined)
    {
      f_offset = 0;
    }
 
    if((index = f_haystack.indexOf(f_needle, f_offset)) > -1)
    {
      return index;
    }
 
    return false;
  },
 
  'strrev' : function(f_string)
  {
    var result = '';
    var index = f_string.length - 1;
 
    while(index >= 0)
    {
      result += f_string.substring(index, index + 1);
      index--;
    }
 
    return result;
  },
 
  'strripos' : function(f_haystack, f_needle, f_offset)
  {
    var haystack = f_haystack.toLowerCase();
    var needle = f_needle.toLowerCase();
    var index = 0;
 
    if((index = haystack.indexOf(needle, f_offset)) > -1)
    {
      do
      {
        f_offset = index;
      }
      while((index = haystack.indexOf(needle, f_offset + 1)) > -1);
 
      return f_offset;
    }
 
    return false;
  },
 
  'strrpos' : function(f_haystack, f_needle, f_offset)
  {
    var index = 0;
 
    if((index = f_haystack.indexOf(f_needle, f_offset)) > -1)
    {
      do
      {
        f_offset = index;
      }
      while((index = f_haystack.indexOf(f_needle, f_offset + 1)) > -1);
 
      return f_offset;
    }
 
    return false;
  },
 
  'strtolower' : function(f_string)
  {
    return f_string.toLowerCase();
  },
 
  'strtoupper' : function(f_string)
  {
    return f_string.toUpperCase();
  },
 
  'substr' : function(f_string, f_start, f_length)
  {
    if(f_start < 0)
    {
      f_start += f_string.length;
    }
 
    if(f_length == undefined)
    {
      f_length = f_string.length;
    }
    else if(f_length < 0)
    {
      f_length += f_string.length;
    }
    else
    {
      f_length += f_start;
    }
 
    if(f_length < f_start)
    {
      f_length = f_start;
    }
 
    return f_string.substring(f_start, f_length);
  },
 
  'substr_count' : function(f_haystack, f_needle, f_offset)
  {
    var result = 0;
    var index = 0;
 
    if(f_offset == undefined)
    {
      f_offset = 0;
    }
 
    while((index = f_haystack.indexOf(f_needle, f_offset + 1)) > -1)
    {
      result++;
      f_offset = index;
    }
 
    return result;
  },
 
  'trim' : function(f_string)
  {
    return f_string.replace(/^\s*/, '').replace(/\s*$/, '');
  },
 
  'ucfirst' : function(f_string)
  {
    return f_string.substring(0, 1).toUpperCase() + f_string.substring(1);
  },
 
  'ucword' : function(f_string)
  {
    var result = '';
    var chr = '';
    var swap = true;
 
    for(var i = 0; i < f_string.length; i++)
    {
      chr = f_string.substring(i, i + 1);
 
      if(swap)
      {
        result += chr.toUpperCase();
      }
      else
      {
        result += chr;
      }
 
      if(chr.match(/\s/))
      {
        swap = true;
      }
      else
      {
        swap = false;
      }
    }
 
    return result;
  }
}

#3. Kevin on 16 January 2008

@ David: Thank you for noticing. I thouhgt of isNaN(), which I think does the trick. If you wan't to be credited differently let me know.

#2. David on 16 January 2008

One of your tests should be:

is_numeric("+186.31e2");

And that needs to return true.

#1. David on 16 January 2008

The is_numeric function is not correct, at least it doesn't work like PHP. A numeric string, like "-876.20" should return true, but it doesn't because it doesn't pass the [typeof mixed_var == 'number'] condition.