$name = "John Taylor";
I want to verify if $name contains "john", if yes echo "found";
Cannot remember which to use:
http://ca.php.net/manual/en/ref.strings.php
Sorry,
John

John Taylor-Johnston wrote:
> $name = "John Taylor";
> I want to verify if $name contains "john", if yes echo "found";
> Cannot remember which to use:
> http://ca.php.net/manual/en/ref.strings.php

Either http://php.net/strpos or http://php.net/stripos if your version
of PHP supports it.

-Stut

--
http://stut.net/

<?php
$name = "John Taylor";
if (strpos($name,'John') > 0){
//you could use stripos for case insensitive search
echo "found";
}
?>

-----Mensagem original-----
De: John Taylor-Johnston [mailto:jt.johnston@USherbrooke.ca]
Enviada em: segunda-feira, 7 de abril de 2008 10:25
Para: PHP-General
Assunto: [php] string

$name = "John Taylor";
I want to verify if $name contains "john", if yes echo "found";
Cannot remember which to use:
http://ca.php.net/manual/en/ref.strings.php
Sorry,
John

--
PHP General Mailing List (http://www.php.net/) To unsubscribe,
visit: http://www.php.net/unsub.php

Thiago Pojda wrote:
> <?php
> $name = "John Taylor";
> if (strpos($name,'John') > 0){
> //you could use stripos for case insensitive search
> echo "found";
> }
> ?>

This will not do what you expect it to. Since 'John' is the first thing
in the string strpos will return 0 causing the condition to evaluate to
false.

As per the documentation for strpos you should compare the value *and
type* of the variable returned by strpos against false to check for
non-existance.

if (strpos($name, 'John') !== false) { ... }

-Stut

--
http://stut.net/

> -----Mensagem original-----
> De: John Taylor-Johnston [mailto:jt.johnston@USherbrooke.ca]
> Enviada em: segunda-feira, 7 de abril de 2008 10:25
> Para: PHP-General
> Assunto: [php] string
>
> $name = "John Taylor";
> I want to verify if $name contains "john", if yes echo "found";
> Cannot remember which to use:
> http://ca.php.net/manual/en/ref.strings.php
> Sorry,
> John
>
> --
> PHP General Mailing List (http://www.php.net/) To unsubscribe,
> visit: http://www.php.net/unsub.php
>
>
>

Never late to learn new stuff, you're right Stut.

Thanks!

-----Mensagem original-----
De: Stut [mailto:stuttle@gmail.com]
Enviada em: segunda-feira, 7 de abril de 2008 10:42
Para: Thiago Pojda
Cc: 'John Taylor-Johnston'; 'PHP-General'
Assunto: Re: RES: [php] string

Thiago Pojda wrote:
> <?php
> $name = "John Taylor";
> if (strpos($name,'John') > 0){
> //you could use stripos for case insensitive search
> echo "found";
> }
> ?>

This will not do what you expect it to. Since 'John' is the
first thing in the string strpos will return 0 causing the
condition to evaluate to false.

As per the documentation for strpos you should compare the value *and
type* of the variable returned by strpos against false to check
for non-existance.

if (strpos($name, 'John') !== false) { ... }

-Stut

--
http://stut.net/

> -----Mensagem original-----
> De: John Taylor-Johnston [mailto:jt.johnston@USherbrooke.ca]
> Enviada em: segunda-feira, 7 de abril de 2008 10:25
> Para: PHP-General
> Assunto: [php] string
>
> $name = "John Taylor";
> I want to verify if $name contains "john", if yes echo "found"; Cannot
> remember which to use:
> http://ca.php.net/manual/en/ref.strings.php
> Sorry,
> John
>
> --
> PHP General Mailing List (http://www.php.net/) To unsubscribe,
> visit: http://www.php.net/unsub.php
>
>
>

On Mon, Apr 7, 2008 at 9:25 AM, John Taylor-Johnston
<jt.johnston@usherbrooke.ca> wrote:
> $name = "John Taylor";
> I want to verify if $name contains "john", if yes echo "found";
> Cannot remember which to use:
> http://ca.php.net/manual/en/ref.strings.php
> Sorry,
> John

<?php
if(stristr($name,'john')) {
// True
}
?>

Since you said you wanted to know if it "contains 'john'", this
will find if 'john' (insensitive) matches any part of the name. So in
your case, it would match on both John and Johnston.

--
</Daniel P. Brown>
Ask me about:
Dedicated servers starting @ $59.99/mo., VPS starting @ $19.99/mo.,
and shared hosting starting @ $2.50/mo.
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Excellent. Thanks all!
John

Daniel Brown wrote:
> On Mon, Apr 7, 2008 at 9:25 AM, John Taylor-Johnston
> <jt.johnston@usherbrooke.ca> wrote:
>
>> $name = "John Taylor";
>> I want to verify if $name contains "john", if yes echo "found";
>> Cannot remember which to use:
>> http://ca.php.net/manual/en/ref.strings.php
>> Sorry,
>> John
>>
>
> <?php
> if(stristr($name,'john')) {
> // True
> }
> ?>
>
> Since you said you wanted to know if it "contains 'john'", this
> will find if 'john' (insensitive) matches any part of the name. So in
> your case, it would match on both John and Johnston.
>
>

Daniel Brown wrote:
> On Mon, Apr 7, 2008 at 9:25 AM, John Taylor-Johnston
> <jt.johnston@usherbrooke.ca> wrote:
>> $name = "John Taylor";
>> I want to verify if $name contains "john", if yes echo "found";
>> Cannot remember which to use:
>> http://ca.php.net/manual/en/ref.strings.php
>> Sorry,
>> John
>
> <?php
> if(stristr($name,'john')) {
> // True
> }
> ?>
>
> Since you said you wanted to know if it "contains 'john'", this
> will find if 'john' (insensitive) matches any part of the name. So in
> your case, it would match on both John and Johnston.
>

I wonder if using strstr() with strtolower() would be faster or slower.

<?php

$max = 10;
$it = 0;
while ( $it++ < $max ) {
echo "Attempt #{$it}<br />";

$string = 'John Doe';
$counter = 10000;
$new_string = strtolower($string);
$start_time_1 = microtime(true);
while ( $counter-- ) {
if ( strstr($new_string, 'john') ) {
### Found it
}
}
echo microtime(true) - $start_time_1."<br />";

$counter = 10000;

$start_time = microtime(true);

while ( $counter-- ) {
if ( stristr($string, 'john') ) {
### Found it
}
}
echo microtime(true) - $start_time."<br />";

}

?>

Results:
Attempt #1
0.015728950500488
0.022881031036377
Attempt #2
0.015363931655884
0.022166967391968
Attempt #3
0.015865087509155
0.022243022918701
Attempt #4
0.015905857086182
0.022934198379517
Attempt #5
0.015322208404541
0.022816181182861
Attempt #6
0.015490055084229
0.021909952163696
Attempt #7
0.015805959701538
0.021935939788818
Attempt #8
0.01572585105896
0.022881984710693
Attempt #9
0.015491008758545
0.022812128067017
Attempt #10
0.015367031097412
0.02212119102478


--
Jim Lucas

"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."

Twelfth Night, Act II, Scene V
by William Shakespeare

On Mon, Apr 7, 2008 at 10:42 AM, Jim Lucas <lists@cmsws.com> wrote:
>
> I wonder if using strstr() with strtolower() would be faster or slower.
[snip=code]
>
> Results:
> Attempt #1
> 0.015728950500488
> 0.022881031036377
[snip!]

While I don't really care much for a single selection about the
difference of less than 7/1,000's of one second, that's still good
information to keep in mind - especially when dealing with large-scale
sites. Nice work, Jim.

--
</Daniel P. Brown>
Ask me about:
Dedicated servers starting @ $59.99/mo., VPS starting @ $19.99/mo.,
and shared hosting starting @ $2.50/mo.
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