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Digg strval
Get string value of a variable
(PHP 4, PHP 5)
Returns the string value of var. See the documentation on string for more information on converting to string. var may be any scalar type. You cannot use strval() on arrays or objects.
See Also
Related Examples ( Source code ) » strval Examples ( Source code ) » Type conversion Approach 1 Code Examples / Notes » strvalredbeard
You can also use the PEAR package Numbers_Words, which handles many other languages.
kendsnyder+phpnet
The only way to convert a large float to a string is to use printf('%0.0f',$float); instead of strval($float); (php 5.1.4). // strval() will lose digits around pow(2,45); echo pow(2,50); // 1.1258999068426E+015 echo (string)pow(2,50); // 1.1258999068426E+015 echo strval(pow(2,50)); // 1.1258999068426E+015 // full conversion printf('%0.0f',pow(2,50)); // 112589906846624 echo sprintf('%0.0f',pow(2,50)); // 112589906846624 steve ball
It seems that one is being treated as an unsigned large int (32 bit), and the other as a signed large int (which has rolled over/under). 2326201276 - (-1968766020) = 4294967296. portos_ze_retour
In complement to Tom Nicholson's contribution, here is the french version (actually it's possible to change the language, but you should check the syntax ;) ) function int_to_words($x) { global $nwords; if(!is_numeric($x)) $w = '#'; else if(fmod($x, 1) != 0) $w = '#'; else { if($x < 0) { $w = $nwords['minus'].' '; $x = -$x; } else $w = ''; // ... now $x is a non-negative integer. if($x < 21) // 0 to 20 $w .= $nwords[$x]; else if($x < 100) { // 21 to 99 $w .= $nwords[10 * floor($x/10)]; $r = fmod($x, 10); if($r > 0) $w .= '-'. $nwords[$r]; } else if($x < 1000) { // 100 to 999 $w .= $nwords[floor($x/100)] .' '.$nwords['hundred']; $r = fmod($x, 100); if($r > 0) $w .= ' '.$nwords['separator'].' '. int_to_words($r); } else if($x < 1000000) { // 1000 to 999999 $w .= int_to_words(floor($x/1000)) .' '.$nwords['thousand']; $r = fmod($x, 1000); if($r > 0) { $w .= ' '; if($r < 100) $w .= $nwords['separator'].' '; $w .= int_to_words($r); } } else { // millions $w .= int_to_words(floor($x/1000000)) .' '.$nwords['million']; $r = fmod($x, 1000000); if($r > 0) { $w .= ' '; if($r < 100) $word .= $nwords['separator'].' '; $w .= int_to_words($r); } } } return $w; } // Usage in English $nwords = array( "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty", 30 => "thirty", 40 => "forty", 50 => "fifty", 60 => "sixty", 70 => "seventy", 80 => "eighty", 90 => "ninety" , "hundred" => "hundred", "thousand"=> "thousand", "million"=>"million", "separator"=>"and", "minus"=>"minus"); echo 'There are currently '. int_to_words(-120223456) . ' members logged on. '; //Utilisation en Francais $nwords = array( "zéro", "un", "deux", "trois", "quatre", "cinq", "six", "sept", "huit", "neuf", "dix", "onze", "douze", "treize", "quatorze", "quinze", "seize", "dix-sept", "dix-huit", "dix-neuf", "vingt", 30 => "trente", 40 => "quarante", 50 => "cinquante", 60 => "soixante", 70 => "soixante-dix", 80 => "quatre-vingt", 90 => "quatre-vingt-dix" , "hundred" => "cent", "thousand"=> "mille", "million"=>"million", "separator"=>"", "minus"=>"moins"); echo 'Il y a actuellement '. int_to_words(-120223456) . ' membres connectés. '; tom nicholson
If you want to convert an integer into an English word string, eg. 29 -> twenty-nine, then here's a function to do it. Note on use of fmod() I used the floating point fmod() in preference to the % operator, because % converts the operands to int, corrupting values outside of the range [-2147483648, 2147483647] I haven't bothered with "billion" because the word means 10e9 or 10e12 depending who you ask. The function returns '#' if the argument does not represent a whole number. <?php $nwords = array( "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty", 30 => "thirty", 40 => "forty", 50 => "fifty", 60 => "sixty", 70 => "seventy", 80 => "eighty", 90 => "ninety" ); function int_to_words($x) { global $nwords; if(!is_numeric($x)) $w = '#'; else if(fmod($x, 1) != 0) $w = '#'; else { if($x < 0) { $w = 'minus '; $x = -$x; } else $w = ''; // ... now $x is a non-negative integer. if($x < 21) // 0 to 20 $w .= $nwords[$x]; else if($x < 100) { // 21 to 99 $w .= $nwords[10 * floor($x/10)]; $r = fmod($x, 10); if($r > 0) $w .= '-'. $nwords[$r]; } else if($x < 1000) { // 100 to 999 $w .= $nwords[floor($x/100)] .' hundred'; $r = fmod($x, 100); if($r > 0) $w .= ' and '. int_to_words($r); } else if($x < 1000000) { // 1000 to 999999 $w .= int_to_words(floor($x/1000)) .' thousand'; $r = fmod($x, 1000); if($r > 0) { $w .= ' '; if($r < 100) $w .= 'and '; $w .= int_to_words($r); } } else { // millions $w .= int_to_words(floor($x/1000000)) .' million'; $r = fmod($x, 1000000); if($r > 0) { $w .= ' '; if($r < 100) $word .= 'and '; $w .= int_to_words($r); } } } return $w; } ?> Usage: <?php echo 'There are currently '. int_to_words($count) . ' members logged on.'; ?> anthony dot parsons
If you have to compare object variables like this be careful not to make a typo, or you could end up calling __set() - <?php /* Does what you'd expect it to */ if ( $user->password == $user2->password ) /* Doesn't */ if ( $user->password = $user2->password ) ?> To avoid that ever happening, do it like this: <?php if ( strval($user->password) == $user2->password ) ?> php
I can't help being surprised that (string)"0" == (string)"0.00" evaluates to true. It's the same with strval and single quotes. === avoids it. Why does it matter? One of my suppliers, unbelievably, uses 0 to mean standard discount and 0.00 to mean no discount in their stock files. brettsg
How come this code in version 4.4 does something different than in version 4.3? $val = 538759009 ^ 0xAABBCCDD; print "val=" . $val; = 2326201276 (version 4.4) and = -1968766020 (version 4.3) hayley watson
As of PHP 5.2, strval() will return the string value of an object, calling its __toString() method to determine what that value is.
nyctofixer
As of PHP 5.1.4 (I have not tested it in later versions), the strval function does not attempt to invoke the __toString method when it encounters an object. This simple wrapper function will handle this circumstance for you: <? /** * Returns the string value of a variable * * This differs from strval in that it invokes __toString if an object is given * and the object has that method */ function stringVal ($value) { // We use get_class_methods instead of method_exists to ensure that __toString is a public method if (is_object($value) && in_array("__toString", get_class_methods($value))) return strval($value->__toString()); else return strval($value); } ?> |
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debug_zval_dump doubleval empty floatval get_defined_vars get_resource_type gettype import_request_variables intval is_array is_binary is_bool is_buffer is_callable is_double is_float is_int is_integer is_long is_null is_numeric is_object is_real is_resource is_scalar is_string is_unicode isset print_r serialize settype strval unserialize unset var_dump var_export |
